In my opinion these proposals don't make sense. If I earn SP I have the right to use it in the best way, including self-voting.
This kind of think to me sounds socialist talk, and I'm a free-market follower. If a person wishes to receive upvote seek to innovate, create services that add value, then you will surely be rewarded.
You are very right.
Take a look at my post inspired by this thread, I support your position strongly.
https://steemit.com/steem/@kyle.anderson/subjective-proof-of-work-some-rational-comments-on-the-self-voting-trend