When i built fence, I had a particular customer who want a vinyl privacy fence installed along the side of their house. Sure, no problem. Their back yard sloped up in a curve approximately at a 60° angle. Vinyl is very rigid and can be difficult to work with. We installed the posts and started getting to work. This man, who was a stay at home something or other, was watching us work from his kitchen window. He came out to try and tell me I installed the post wrong because it "looked wrong to him". I out my level on all 4 corners of the post to show him the installation was done correctly. He asked me to angle the post. I asked him "you want me to make it unlevel on purpose?" And he said yes. I asked for him to put that in writing to cover my own ass, he obliged. We continue finishing up the fence (was only about 120' or so of fence) and by this time his wife arrived home. She stated the post looked wrong (the one he asked us to install unlevel). And asked us to fix it. I got the paper out with his signature on it and his face went beat red. She was furious with him screaming at him asking why he would ask us to do a bad job.
Needless to say we took the post back out along with some of the panels to redo it. She apologized profusely and stated she was the one that was paying for the fence and not him.
He clearly did not wear the pants in his house and needed some sort of semblance of power and tried to do that with us.
End of the day, she was happy and we got paid. The tl;dr is let the professionals do what they need to do and trust their judgment.