The grass looks typical of how good greens are maintained.
As for filling the holes..... The holes are moved round greens on a regular basis so repairs are fairly straight forward. Weed killer would be devastating though.
The greens are a must water area and the rest is left to nature. Very few courses have sprinklers on the fairways and tees.
I played at Langland Bay on Gower last week on an awayday. Greens immaculate but fairways brown, hard, bare. Stunning views. Used my umbrella a few times to block the sun.
When our course was built about 30 years ago each green cost about £10k due to structure, drainage, soil, sprinklers. They are very high maintenance. Moles are a big problem sometimes but never on greens as the treatments to clear worms ( they leave casts you need to clean up) means they tend to stay away as no food there. One of our members is a molecatcher! He has caught dozens this year when in areas needing clearing. Left alone if out of the way.
Golf courses are commercial businesses and water is a resource. I wonder if car wash places get targeted? Garden centres? Food producers?