I once upon a time made a service call to a maintenance facility owned by a large chain of convenience stores once to work on a brand new refrigeration unit on a semi trailer. Upon arriving, I found four mechanics, and the service manager standing there on the deck of a Mack truck staring intently at the unit, doors open. Collectively, there was about $300/hr worth of mechanical ability there at that moment. They were all dumbfounded about why the thing was not charging it's battery. I shut it off, put my hand on the alternator pulley (which was smoking, literally burning the paint off it). I borrowed a 1/2" wrench, and tightened the belt. All better.

My wife makes no attempt to do home repair stuff unless I am not here. And then She has done well on her own. She installed a new entry door on the house a few years ago whilst I was on a road trip out of town for a week (after locking herself out of the house, and the destroying the door to get in, because there was food on the stove, with a fire under it). She did fine job too, I must add !

Sometimes there is just no winning. That is the way life is. She will get over it, eventually.