Totally! I definitely didn't mean to imply this is the Prof/TA's fault. It is the fault of many institutions and systems above them. I meant that TA's shouldn't be responsible for grading 4 sections of 60 students each. The only natural outcome of that is poor education, one facet of which is easily cheatable assignments.
It just seems ridiculous that the thing we are focusing on is that kids are cheating and not that we've made this massive, unscalable, expensive, ineffective education system. We are acting like its the kids who aren't holding up their end of the bargain when they try and cheat it.