I'm not comfortable with what he says to the heavier girls as well, but you know what? He's right.
Heavier men could make it in the music industry, but a heavier woman? Nope. It's awful, but true. I don't expect that double-standard to change any time soon, sad as it is.
Edited to add:
There are always exceptions, of course. Frenchie Davis was heavier, but she had the talent to make it that far. Most of the heavier girls on Idol don't make it that far because, frankly, they're not that good, like most of the others you see during the audition process.
That's not to say a heavier woman couldn't have a singing career ... but if you want a career in the kind of music they're pimping on American Idol ... not going to happen.
Pop music is all about image, and being overweight seems to be the last "acceptable" way to discriminate.