Of course it's a problem to draft a guy who has no path to playing time.
Nah, a problem is drafting a player at 16 and penciling them in the rotation for a playoff bound team.
Why should we treat the rotation of a team that
might make it into the playoffs as a bottom seed as if it's inviolable? This isn't the Garnett-era Celts we're talking about here. Giving playing time to a rookie isn't going to cost the team a shot at a championship.
You seem to feel that the Celts roster (in terms of guards) is set in stone for the next few years. I'm not sure that's the case.
Thomas, Smart, and Bradley are a few of the team's best players. I wouldn't rule out any or all of them being gone in a year or two, by any means, but it would surprise me.
Rozier could very well earn the backup point guard role once Evan Turner is gone. Still, my feeling on Rozier all along has been that, unless he was far and away the best talent remaining, it would've made a lot more sense to draft a guy who filled a more obvious need, and thus stood a greater chance of making it into the rotation in a substantial role.
I guess Ainge probably felt Rozier was clearly the best player available at that spot. We haven't really seen anything to support that though, so far.