That's your choice. Mine was to be involved.
This is my experience as well. Over the years I have learned to RECOGNIZE mechanical problems and mistakes, mostly because I have eliminated any electrical issues. My hit rate is pretty good, yet technically, the mechanical issues are not my responsibility. I’m there to make the motor work. Once it does, I should be able to walk away. But so often there is nobody else around with two brain cells to rub together to figure out why something isn’t working right. I do it because I care, but it drives me nuts sometimes, ESPECIALLY when someone else who SHOULD take responsibility is there, and has no clue.
I got caught up in an “argument” with a pump supplier once over his having sold a customer a 100HP pump to replace a 400HP pump, telling them that they could put a VFD on it and run it faster to get more water flow. I pointed out the physics problem with that idea, they kept dragging me back into meetings with the owner, insisting that I was just being stubborn about not wanting to reprogram the drive. I sent the owner a bill for my time wasted in those meetings, he eventually paid it once he read all the stuff I gave him about the Affinity Speed Law for centrifugal pumps. The pump guy didn’t know that? That was HIS job, not mine!