The perfect theft in crypto is claiming that a project or an exchange is hacked when its all an inside job,
I agree, but the problem lies in how to prove that it is an inside job. We can spread rumors about it but can be easily debunked if valid proof isn't presented. It will only look like witch-hunt stuff.
the reason why I think about this is I have never heard about other top exchanges helping a exchange that just got hacked to track their funds and get some back at least but if it's a sole hacker from outside they will track him or them down, why is that?.
It is not the responsibility of other crypto exchanges to help their competitors. They can cooperate in blocking cash-out transactions if the hacked crypto was moved to their exchanges and I think that is enough to consider as giving a hand.