The answer is that there is no real overall value proposition for having bid bots/ vote selling on the platform.

My guess is they're scared if they eliminate bidbots and delegation as a method of passive "investment" then a lot of stakeholders will have no reason to hold SP anymore? Of course it's impossible to keep that faucet hooked up to the "Content" pool while also trying to make it systematically better to manually curate, which renders the EIP ridiculous. But who knows?