It's a free market and commissions for painting miniatures are not regulated in any way what so ever save for appropriate tax aspects and employment etc... Ergo the business side.
The artistic skill has no regulation - no control - no approval body. It's purely a case of market choice - buyer choice.
And yes in nearly any market there will be more people of lower skill and fewer of higher. Where there isn't regulation to provide a minimum standard the numbers of unskilled or lower skilled will typically be greater.
So posts like this won't achieve anything save to vent
(and thankfully threads like this are super rare - unlike on photography forums where you can spark them up rather like this very quickly

)