mmmhmmm...yeah...sure.
Tell me, why haven't you ever used the Ju-88, Stuka or Ki-67? Too slow, too vulnerable maybe not enough payload to do any good in one shot? Beefcake is the same way...as a matter of fact, neither has the OP of this thread.
I'm betting aside from the "cool factor"...those who are wanting the B-29 want to be able to do high alt milk runs and drop a base or town in a single run...nothing more.
gyrene do you know what my favorite plane to fly in AH is? The B25C. And I only fly it in the Late War Arena. I usually die in it but I like the challenge of trying to make through enemy lines to drop on a contested base. The B25C is rather slow, has a tiny bomb load, and has the poorest reward defense of any medium bomber in the game, yet it's my favorite to fly.
Secondly I don't milk run in this game. Ask around. I'm the type of buff pilot who likes to fly and test his gunnery skills. I could care less about bombing, in fact many times I just go and bomb the runway at an enemy base with the hopes of getting a few planes to up and intercept me. To me the thrill of combat is facing a pilot who KNOWS how to kill buffs and getting test my gunnery against their tactics. This is even made more fun by doing it in a B25.

At this point I really don't care if the B29 was added to the game or not. However, I do wish us buff pilots could get a new ride. An He-111 would be quite fun right now and would be a nice change from my B25. But I'd be happy with anything.