More dangerous to other teams but maybe even more dangerous for us. 1. Maggette is a poor defender. It's the defense that fuels an efficient offense. 2. Maggette would need to get touches. Who are you taking shots from? Ray, Pierce, Garnett? Maggette would mostly be a 3rd option to score. 3. Outside shooters are important not only, or not even mainly, because of what they score but due to the spacing they provide. 4. Some players can get their game going without many shots, but probably that's not the case with Maggette. He's a player who has to dominate the ball to be effective, he's a high usage rate guy. Can he be effective doing less? Is this the kind of player you want to be your 3rd scoring option, a prototypical scorer?
I'd view Maggette as our Manu Ginobili, in terms of role.
1.) Maggette may be a poor defender, but this is a team defense. Ray Allen was a poor defender too (and some say so about Paul, though I disagree on that). You don't need great individual defenders to play good team defense. Rip Hamilton is a poor defender (and he starts!), but Detroit does alright. The same goes for Gino, he may be worse. Hell, the Cavs started WALLY, and they played some of the best D in the playoffs.
2.) He's the first bench scorer. Without House and Posey, who is going to score consistently off the bench?
3.) Agreed. If we lose out on Pose and bring in Maggette, we'd need to add a good shooter. I'd be more than happy to see House back in green in that scenario.
4.) I have no problem with our last scoring option being a prototypical scorer. 
I could care less where the shots come from. Take the shot when he's open, pass it when he's not. That was supposedly the C's biggest problem last year when they brought in Ray and KG (too many good players! bad!
). If Maggette is willing to put team first and sacrifice (ubuntu), then it's moot.
I'd still be more than happy to see Posey back (I'm not fully convinced this is the situation Maggette is looking for), but the C's can be just as good, if not better next year if they signed Maggette instead.
Maggette is a subpar SG. He's not Manu. We also don't have a Bowen. And he's a SF who you don't want to play extended minutes in other positions, including the 2, where is a much less efficient player. And Manu is a faux bench player, he's basically a starter who doesn't start.
You don't need great individual defenders to play good team defense.Myth. There's no team defense that can save you if you don't have good individual defenders. Do you know the difference between our defense and Pacers' defense? It's explained by a single reason: we have great individual defenders, they don't. I've already written a variety of posts about the overrated nature of team defense over here, including in this thread.
Ray Allen was a poor defender tooMyth. I've already given this recomendation: go see the 2001 ECF again. Ray Allen put a defensive clinic guarding MVP Allen Iverson, who stated that he was the best defender he faced all season. Ray Allen was a very good defender with the Bucks, a very good defender in college.
and some say so about PaulWhen asked, motivated and coached to play defense, Pierce was always a top 5 defender in his position. Another myth.
The problem with Ray and Pierce is that they're aging and I don't think it's wise to assign them to defend the opponent's best winger every night, every game. It will make them less effective in the other end of the court. It's a bad trade-off, as both of them are way better players than Maggette and complement each other better (Corey is basically a poor man's Pierce).
2.) He's the first bench scorer. Without House and Posey, who is going to score consistently off the bench?Not sure if I understand. We already have 3 all-star scorers in the starting 5. We need scoring off the bench, but why should that be the priority?
The same goes for Gino, he may be worseNo, he's not.
Hell, the Cavs started WALLY, and they played some of the best D in the playoffsThe Cavs played good defense in spite of Wally. They played a very bold defensive system against us, using a centerfield, assigning Wally to a role is perfectly able to fill. And besides their bigs and LeBron, they have elite defenders from the bench: Varejão and a winger, Pavlovic. Now, imagine you're facing the Cavs once again. Pierce needs to get a rest or gets himself in foul trouble. Who are you going to put on LeBron? Maggette? Ray Allen? The 6'3'' rookie? Scalabrine? Maggette allows a opponent PER of 18.4. The average SF in the league has borderline All-Star numbers when facing him.
If we lose out on Pose and bring in Maggette, we'd need to add a good shooter.And how are you going to play all these guys? We are ending up using our best offensive players (Ray, Pierce) primarily as defenders.
4.) I have no problem with our last scoring option being a prototypical scorer.You should. A prototypical scorer is a player that basically scores and is only efficient when scoring. Basketball is much more than scoring. Who's going to do the other things? Scorers? They're going to do it poorly. That's what the concept of role-player is about. Red Auerbach invented it for a reason. If your last scoring option is a scorer, you are probably headed to a lottery spot.