I don't see why there is an argument here to begin with....Edge has won dozens of time with a spear and with him it didn't even look threatening, the guy's built like Jughead Jones ffs. I mean with a guy like Goldberg it looked frightening of course, but with Edge? No. Point is that it's a finisher and as the name indicates it's meant to "finish". If you want 100% accurate reality you should be watching documentary films, not WWE or any other kind of TV for entertainment.
BTW the only finishers that look legit brutal are the submission maneuvers, i.e Walls of Jericho, Figure four leg lock, crossface, sharpshooter etc.