What products have you used that have had specific instructions or directions that you found are not needed. I just came back from a visit from the mens room and read “To remove toilet seat cover, first pull up, then pull down”. Well, me being the sceptical creature I am. I folded it over the lip and then pulled straight down, directly disobeying its orders. Guess what? It came out just fine. I then threw it right in the toilet 'cause I don’t use those silly things.
What have you come across?
Removing shell meats before eating excluded we all know that’s just plain silly.
Also there used to be an electrical item (I forget what sort) many years ago that came with instructions for use. The first instruction used to baffle many many people as it was an overly elaborate description of how to find a wall socket, put the item’s plug in and flick the switch…
My experience does not chime with yours -if the hair is actually dirty, twice does help - but if one were really to follow the instructions, of course, the washing would never end.