Not convinced of this. (Your handle doesn’t make it a more convincing claim.)

I’m not saying I’m totally convinced that PoS can be really secure, but I am reasonably confident that some developing such systems sincerely believe it can be, and have no deceptive intent. This in my mind seems to contradict it being “a scam”, which to my mind requires deception.

In fact, I do suspect that it can be secure, for some reasonable sense of “secure”, though I am not especially confident in this.