I don't speak for anyone but myself, but I would never trust the integrity of a broadhead that was randomly found in a dead deer. Nor would I want to go into the woods carrying a bunch of different heads in my quiver, many of which I'm sure have different flight characteristics.

I tune my bow and my arrows to the specific head I'm shooting to insure optimal flight and performance out of every arrow, every shot. When it comes to cutting corners and saving a few bucks, I'm not going to do it at the expense of the most important piece of the puzzle when it comes to killing a deer with archery equipment.