What concerns me most with these pistols is how they will hold up down the road, years and decades later after use and abuse. All you have there is a little piece of metal holding back that hammer. Like all mechanical devices, things wear out over time and what's to say that a hard enough bump or jar won't set that thing off some day and Murphy says these things tend to happen at the worst possible moments. With an external safety you at least have a secondary back up in case the primary fails. If you don't like the safety, don't use it, I don't see why it's a big deal. Nobody questions why long guns have safeties so why is it such a problem with semi-autos?
While I don't have any statistics to back me up...
