That's simply not true - if you look at the route to the stadium it was completely different at the Liverpool end and was always going to be a total disaster. It was a really long route, with lots of bottle necks and pinch points.
What if City get to a Champions League final and you have a ticket, but you ended up being crushed in a queue for hours on end, then can't get in because some fucker has used a fake version of your ticket?
Of course the fucker with the fake ticket is responsible. But if UEFA knew there were likely to be fakes, and not only didn't plan to deal with them, but set up a system which encouraged the crush, would YOU feel pissed off? Sure you'd be angry about the idiot trying to jib in, but that's what idiots do. UEFA on the other hand are supposed to think about these things and do their very best to ensure you're safe and can get in to the ground with your legit ticket.