But as you said, there's a time and place for the brilliant IC, and that's usually the very very early stages of a business.
There are two kinds of ICs that I like to call capability guys and capacity guys. Capability guys can bring new skills into the organisation, and capacity guys can do the bread-and-butter work that actually pays the bills. You need to balance the two. Make sure the capacity guys benefit from learning the new skills and make sure the capability guys don’t go off on a tangent, and it can be a very enriching experience for everyone.