Bald men are discriminated against for jobs and are often joked about but it's not like they can control their genetics. Fat people can actually lose the weight.
What about those, who are bald AND fat, and still get good jobs, money, fame, and women?
Fat Vin Diesel is laughing at your rant.
I think he means that something like this is going to be the exception, and sure as shit not the rule.
Also, this isn't saying that bald people aren't going to be successful in life. It's just pointing out that in society it is fine to make fun of someones looks when it falls under certain categories (OP is talking about, in particular, being bald) but you can't do it (or it's frowned upon) if you're making fun of someone's weight.
The double standard is all it is, really.