It's your stake, so it's completely up to you how you use it, and I see no issues with your reasoning, they're valid points. I understand some people rely on Hive for a living in less fortunate areas, but it would be nice to see them power up at least a small portion for a couple of reasons:
They could earn more curation rewards in the long run, which would also allow them to support others in similar situations who are contributing quality content.
In general, I think some people are taking advantage of the situation. They're happy to receive support and cash out, but they're not really contributing to help others on the platform. Morally, that bother me.
I believe the platform would benefit overall if people weren't just cashing everything out. Thankfully, it seems like most people aren't doing this.
RE: Power up or Power Off?