I agree with what you're saying but I am not in the reward pool being taken away and forcing SMTs to be the only PoB on Steem. I will make a video explaining my thoughts better then I can in the comments. But you are exactly right at naming the issues, I just think the solution, while sounds great on paper, I don't think will work well in practice.
Now, if we are talking about removing the reward pool down the line, as the inflation shrinks and SMTs will be forced to step up. But I am not a fan of removing it until both SMTs are mature, and the reward pool inflation has become so low, that people are naturally forced into using SMTs more.