4 years ago I sold a house. Buyers hired the most picky inspector (yet the dumbest inspector) I've ever dealt with. The moron flooded the basement during his inspection somehow. Called out the hairline cracks in the driveway as a major issue, among many other things.
Buyers asked me to fix about 80 different things, some of them severely retarded, such as a small low spot in the yard, and they wanted me to pay for a full cleaning and inspection of the wood stove and chimney and shampoo all the carpets (75% of the carpet was brand new). I picked out about 10 things that would be easy to fix (including replacing the caulk around the tub and fixing the low spot in the yard) and told them that is ALL I would fix. They took it. I went over on a Saturday afternoon, dumped a bucket of dirt in the yard and sprinkled some seed on it, caulked the tub, put some sealer in the hairline crack on the driveway, fixed other small crap I can't recall and called them to let them know they could re-inspect. Retarded inspector said it was all good. Haha
But on your point. Of ALL the stupid things they asked for, none of them specified a licensed contractor EXCEPT replacing a faulty gfci outlet on the back patio and they demanded to see a receipt for that one. Good thing I have a friend that is licensed. He just stopped by one day as he was in the area and did it while it was live (house was empty and locked up). He charged me $40 and wrote a receipt to satisfy them.