You have it exactly right.. there are many smaller dogs that have an innate sense of aggression..and if they were larger, the results would be the same as for pit bulls..and people would be calling for their removal and extinction..
Having said that, however, and having known sweet tempered pit bulls, I still would NEVER trust one completely, and I wouldn’t be willing to risk someone’s life or health just to make a point.
I think fully trusting ANY dog is not smart when talking about kids and family, etc.
You make a good point when you say that people own these to make a point. I agree and think that that is moronic.
There seems to be an easy solution then. Have the breeders selectively breed them down to the size of Yorkies. A win-win. The pit bull fans get the dogs whose personalities they claim to so love and the rest of the world isn't seriously threatened by them. ;-)
Of course, even if this was possible, it wouldn't work because a lot of pit bull owners want the dogs because of the dog's menace.