There's no defined stop point for physical development either... Top performing athletes still have trainers, and nobody sees that as a problem. If it's mental development though, it must have a stop point?
> If it's mental development though, it must have a stop point?
What is being developed, exactly?
The athlete is the extreme example, but there are obviously people who are not career athletes that don't have a defined stop point with employing a trainer (maybe you could say "death" is the stop point).
Most everyone who goes to spinning class isn't a career athlete. Some of them are terribly out of shape, and some of those people just want to get in shape. Others may already be in shape, but see the spinning class as a way to either improve or maintain their conditioning. None of this is deemed ridiculous.
I'm curious, it's considered the norm to regularly see a doctor or dentist, do you think they're preying on their patients?
> What is being developed, exactly?
Mental health. There's obviously a more involved answer, but if you don't know it already, it's unlikely I'll be able to educate you with a comment on social media.