Proof of work is just that, proof that it did work. What work it’s doing isn’t defined by that definition. Git doesn’t ask for proof, but it does do work. Presumably the proof part isn’t the thing you have an issue with. I agree it sucks that this isn’t being used to do something constructive, but as long as it’s kept to a minimum in user time scales, it shouldn’t be a big deal.

Crypto currencies are an issue because they do the work continuously, 24/7. This is a one-time operation per view (I assume per view and not once ever), which with human input times isn’t going to be much. AI garbage does consume massive amounts of power though, so damaging those is beneficial.