Code review tools are designed for less organised dev teams that don’t do PRs and mandatory human reviews already.

It is papering over a lower level of competency without having to invest in actual human oversight or real process improvement.

That's a thoroughly uncharitable view. Especially in smaller orgs with a minimum velocity dictated by the company's need to survive, the amount of code required to be written just to keep up with your competitors is massive. Trying to review that all by hand, thoroughly, is draining, thankless, and tedious. You end up with a few fast movers producing most of the code, and some slower movers forced into a reviewer role they never signed up for. It's an unhealthy dynamic.