I think its fair to challenge this. Punching someone and taking their wallet is one way I might enrich myself, but I don’t think it’s a stretch to say I’d be worse off having done it. I’d be better off relative to the person I assaulted and stole from, but not better off. And signing an agreement that I have to continue to earn punch-related income as part of a deal to get to punch someone would full out crazy-stupid.
The US has terrible copyright laws (I’m just using this as an example I’m familiar with, but the treaty must cover a large number of reas.). Ratifying a treaty that makes others have the same terrible copyright laws is bad for the US because it supports the US continuing to have terrible copyright laws.