Earlier quoted context omitted.
I find the opposite. If you want something done right you have to do it yourself. I try to only pay for labor when it's low/medium skill labor paired with a capital investment I don't want to make (e.g. getting new tires on my car and an alignment) or when I'm paying for a member of a professional club for their reputation and club membership (e.g. a lawyer or realtor)
There are lots of pros out there who don't know what they are doing. That is true in all fields. Still, I'm certain that there is someone for hire that can outperform an amateur. Even if the final product is good in either case, there are other considerations like time investment (hours and calendar), and opportunity costs.
Often these pros are also the ones that are easiest to find because the ones that know what they are doing are in high enough demand that they go mainly off word of mouth and friend-of-a-friend type business.
We bought a house three years ago that was built in 2006. The number of things I've found that were done just blatantly wrong has soured my opinion of general contract labor quite considerably.
I hired someone to fix some water damage by a door about three months after we moved in. The next spring when it rained we had a literal waterfall coming in from the top of the door frame.
Never again.
I've since torn that entire wall down to the studs, cleaned everything up, put it back together correctly, and rebuilt the attached deck.
I don't know how much that would have cost to get fixed by a professional (supposing I could have found one that actually knew what they were doing), but I'm guessing it was easily $10-$20k of work if labor was factored in.