The reason is simple, they know how popular Bitcoin has become and how the whole world is adopting and admiring Bitcoin, and we know that when something becomes famous, people tend to become appreciative or praise the creator of that thing, and that is the exact reason why these people are trying their best to prove that they are Satoshi Nakamoto or at least claim to be. From the list you've provided, I've only known about Craig Wright.
I don't really understand what makes them think that the public will actually believe in them and accept that yes, one of them is actually Satoshi Nakamoto. Besides, how the hell do they know that Satoshi was actually an individual and it wasn't a group of people who created the technology?
That is still unknown until today since the name Satoshi has been active only until 2010 and after that we have not heard from him/them ever since. But the only reason I know why a lot of people are claiming the name of Satoshi because they just want to take advantage of bitcoin while its hot and is very in demand. That means when it comes to scamming, they will have the opportunity to scam a lot of people if they will be convinced to believe on them.
I have no other possible reason that I can think when it comes to this kind of situation. If its not about money, then these people would not be so trying hard to convince and deceive other people even if the chance to be successful is very slim.