You say a lot here, I'm gonna try my best to break it down.
Bayless and Smith are reporters. They aren't analysts. That's why they do every sport.
They are not reporters, they're on-air personalities, a walking talking op-ed column. Reporters present facts, as they are, as objectively as possible.
It seems unrealistic to me to expect a coach to go on next weeks show and say "Skip. Do you know why they run a zone blitz defense or a cover 2?" and expect Skip to nail it and then the next week a baseball coach to come in and be like "Skip. Do you know why we use the suicide squeeze?" and expect Skip to nail that too.
I don't think that its unrealistic at all to expect a person who is paid to be knowledgeable about sports to be innately knowledgeable about sports, and to do his homework enough to have a good idea of all the facts before forming an opinion he shares with millions of people. I've heard before that all the SportsCenter anchors are like walking sports encyclopedias.
And as for the analysts. Magic, Wilborn, Jon Barry, and in game Van Gundy I think Van Gundy is the only one who ever explains anything at all, but even most of his analysis is based on saying things like "They better step up if they expect to win" and "You're never going to get that call. Never in a million years sonny!" I have just never listened to Jon Barry and thought "Wow. He knows so much. He's so clear." Maybe he does, but I don't feel like he's showing it
Magic is terrible. Wilpon is okay, as long as you're not leaning on him to be 'basketball guy' and instead ask him to be a little more like Ernie on TNT. Jon Barry is the most likely of those 4 to bring something useful to the table, I've heard him say a lot of things I thought insightful, and more than a few that were beyond my own understanding of basketball.
Chris Broussard should be catapulted beyond the city walls.