The reason is fun, and no justification is needed. Maybe you've spent too long looking at the world in a purely progress-driven way. EDIT: I've been there before, but imo the point of progress is to have fun in the end anyway
No, I am precisely not looking at the world in a purely progress-driven way. I think many of creators do - they think they bring a piece of progress to the world, where in fact they might bring regress - in this context, a service which is enabling people to sound like someone else, adding up to the pile of confusion and fake content.
Interesting way of looking at it, although it aught to be clarified this is some sort of "mean average" success for capitalising on an idea, ignoring other definitions of success, non-standard paths to success (which are probably the norm for most), and luck factors etc.
Disagree on the leeches point, just because someone trades their time for resources in a convoluted way doesn't necessarily mean they're leeching.