I know some of those accounts. The problem is that some of the big accounts who put them on auto vote are not even present on Hive, and some of them are present but they don't really bother to even check the people they curate because of their laziness.
Unfortunately these people also just wants to make their curation rewards without checking. I understand, it feels sad that the ones who don't care are the ones getting the most support, but if most big Curation accounts can review their voting activities, it'll be way better.