Your points are wrong because they are standing upon the sand of faulty logic. You keep touting this "likely" failure of multiple points on Zero Tolerance knives, but the fact remains that those occurrences aren't actually "likely" and that ZT knives are just as good as any other knife for the purposes of "hard use".
Look, let's just clear up all the nebulous terminology: what does "hard use" mean to you? Prying up manhole covers, helping fat guys step up on a wooden contraption, or using the knife as something to hang weights from?
Or is it cutting a variety of materials, in a variety of environments? Because if it's the latter, guess what? Sorry, ZTs do just as well. I really don't know much clearer I can make this for you.
I'll just say it: if you need the ridiculous strength the Triad lock provides, then you shouldn't be using a folding knife in the first place, because it's clearly the wrong tool for the job. So, don't call Zero Tolerance products inferior or "not as good for hard use" because they aren't designed to be something they're not: crowbars, or weight stands.