You may be misrepresenting what I said in reply to the statement that dental assistants have an IQ of 100.
If this is the case, and it probably is the case, then being a dental assistant is a good and interesting job for someone of this IQ.
It is easy to research the average IQ for any given type of work.
Just go online and you will find this information.
And who is saying that they do not do the best that they can do?
Certainly not I.
Did I say they were bad people, and thank you for confirming they are probably good people.
And, finally, I was not and do not wish to demean anyone.
For every job there is an optimal range of intelligence which is both good for the worker and good for the employer, and good for society.
I am not sure why you are getting so steamed up, however...