True, but as long as there are rules, somebody is going to find a loophole or a way to game the system. I'd personally be more concerned with Google improving their product or with society's increasing reliance on a single company's service and our unwillingness to consume information critically.
PBNs are garbagey, but trying to put them all down is unrealistic. And even if they could be stopped, it would only be a band aid fix, not addressing the real problems.
Hundreds of sites have been brought down for hosting pirated movies thanks to laws against that, don't know why putting down PBns would be unrealistic.
I read your comment as suggesting that certain actions aren't a good use of time or that they shouldn't be done because they don't fully solve the problem.
I understand the dissatisfaction with half-measures. But I would argue as long as the actions have a meaningful impact and there isn't a promising alternative, it is still worthwhile.
PBNs are garbagey, but trying to put them all down is unrealistic. And even if they could be stopped, it would only be a band aid fix, not addressing the real problems.