Post count is the biggest reason for why users are against the change. The argument should be flipped. If it does not matter, then why be against making the button mandatory? Logically it makes no sense to use the button over posting manually unless you're using the feature that is associated with it and even then it's trumped by being able to gain post count effortlessly. It kind of spoils the reason for it's creation. For quality purposes, it makes sense to make it mandatory. See my reply a page back listing some reasons.
Hey, thanks for that I went back and looked at your positives list and I agree with you in every point you made of why it would be a positive (besides #5 because I'm still not totally sure on what Sythe gold is lol).
I think the point you're maybe missing is that people don't really like change, from what I'm reading there has never been a bump button before and people enjoy gaining "effortless" post count so they're inclined to side against you whether it would be a benefit to the site or not.
People will be more concerned with their own wants as opposed as to what's best for the overall community and as sad as the reality is, it applies to real-life too, it's like offering 1 Sythe member $10,000 or if they choose decline the whole website gets $1,000 each, 9/10 times the persons taking that $10,000 for themselves.
So in conclusion, you are right, I agree, it would be beneficial given the points you made, so I changed my vote to yes, however sadly, not everyone's will put the community over themselves in terms of priority and beneficial change.