What's the big deal on JaJuan Johnson's size?

Look at Chris Bosh he isn't much bigger and is the same type of forward and he's done pretty well for himself, wouldn't you say? he doesn't attack the basket worth a sh*t but he shoots great for a big man. same for Johnson. couls he be Bosh 2.0 (who DOESN'T look like Shelden from the Big Bang Theory?)