Courts -- under common law jurisdictions -- don't interpret contracts and licenses literally. If you stick within the spirit of a license or contract, you might be okay (even if you break the letter), and vice-versa.

Beyond that, it's a question of damages and consequences. Omitting a warranty disclaimer isn't likely to result in a lot of damages.

And finally, there are odds of getting sued. If you infringe on my AGPL code, I'll be pissed. I used that license for a reason. On the other hand, I /hope/ my MIT-licensed code is reused in commercial products. If you infringe on some term, I probably won't care.

There's a lot more nuance than that, starting with statutory law jurisdictions like France to things like statutory damages, and I'm intentionally oversimplifying.

However, from a 10,000 foot view infringing on the GPL versus on an MIT license are very different beasts, and there's good reason to be a lot more worried about the former.