Indeed. To have such people around removes the usefulness of certain shortcuts, which is really annoying. It's quite the irritation to have to do 10x the work to catch certain assumptions and then still have no result because you're dealing with morons.
In the top 50%, things are ok. Once you bring in the bottom 50%, things go all askew. You can no longer bank on certain aspects of a person's rationality and perception. You cannot use their projected image to formulate a baseline because their projection has no basis in reality.
In a room with only people with an IQ of ~110 and above, everybody will basically be on the same page. Their methods will be similar. 160's may do certain things faster and with more precision, but not necessarily due to fundamental differences in procedure.
You start bringing in 80's, though, and everything changes. Their procedures are absolute crap, and you can't get them to fix their procedures because the procedure they use to judge the validity of their procedures is also crap.
They're perpetual victims of their own stupidity, and to have them around changes the entire social dynamic. It really sucks having to be on constant watch for idiots and to need a constant noise cancellation routine in operation.
Much better to be among smart people.
A shop full of just Electronic Technicians is a wonderous thing. Bring in
Radiomen and... you have to hope they're of the "cute" and "female" variety and don't make the mistake of saying too much.