but often the video isn’t clear or fine quality enough
Wouldn't it be great if 100x the effort that didn't go into making the video clear or fine quality enough, instead didn't go into making relevant flying, see-through overlay decals?
Ultimately the reason it looks cool is that you're comparing a situation of little effort being put into repair related documentation, to some movie scenario where 20 person-hours were spent making a 20-second repair fragment whereby 1 step of a repair is done.
Well the OP talks about a fridge.
I think if anything it's even worse for tiny things with tiny screws.
What kind of floating hologram is there gonna be that's of any use, for something that has no schematic and the closest you have to a repair manual is some guy filming themselves taking apart some related product once?
It looks cool in a movie because it's a 20 second clip in which one connector gets plugged, and tens of person hours were spent on it by very talented people who know how to set up a scene that looks good and not just visually noisy.