[zaphar]

Anecdotes are always a terrible way to prove a point. I suspect that your examples are probably the kind that prove the rule. You may have been on teams where deadlocks didn't happen for your tenure. But did they happen before or after your tenure? A tech lead is like health insurance. It's not there for when you aren't sick. It's there for when you are. and it's usually too late to get it when you are already sick.