I don't think it's always obvious whether a proposal is crazy or anti-shareholder, such as the Elon Musk pay package that I mentioned.
Furthermore, it matters a great deal to active managers that the companies they have picked perform well, so they are incentivised to vote for what they think will benefit the company. Passive managers have much less of a stake in the performance of the individual companies, since they are just tracking the index. A very small number of people wielding a substantial portion of voting power when they do not have a lot of skin in the game doesn't sound wise to me.