I don't think that was a lack of courage. I'm skeptical that Aldridge was frightened of Maggette. I think it was just an odd match-up. Maggette has given a lot of teams fits in the paint because he's an unusual player.
The Magette issue can not be, imho, be attributed to LMA. It was bad officiating. If anything, anytime LMA tried to use his size/bulk CM would flop and the officials would buy this. I am OK with people saying that LMA needs to be a bit tougher on the block, but using effin' Magette as an example is just not right. LMA most definitely did not run away from him, the refs killed him anything he tried to take it hard to the paint.
I don't care how much he weighs, as long as he's not guys' like Amare's "chump change" night in and night out.