If I can hire someone to hang rock, shingle, etc…who is faster, does a better job, at a third of the cost, then so be it. I want the best possible product at the best possible rate. It’s difficult to find others to compete in a timely manner in some places.
Seeing what I see on residential jobs all the time, they may do it faster and cheaper, but I can attest that most of the work is far from a better job. Soft spots in roofs, drywall hung before installing insulation, wires cut, etc.