This really depends on the company.
Hospitals won't hire engineers to do the doctor's job.
If you want idols who sincerely love doing all that, idols from JYPE might be what you looking for.
JYPE generally screened their trainees for this value cause that is what they believe in.
So, it is a win-win situation for the idols and those fans. They both get to do what they love.
Well this is not to say that other companies don't have this,
but JYPE has been open about this and you can just look at their previous and current groups as proof of it.