I think we’re making the subject way harder than it should be.
We are all aware of our responsibilities, both when we’re flying or sitting on “the other end”. There’s no discussion that the PIC has the final word in controlling his aircraft, and there’s noone challenging that he is responsible for looking out and avoiding other traffic.
Noone is saying you can jail an ATCO for doing his best, even in uncontrolled airspace, when he is following the rules.
So as I said earlier, they won’t pad you and say “good job”, if someone collided when you only provided traffic info, they’d probably say you could have done more..... but it was within the rules and you’re not to blame.
But that’s how every report will be.... what could every participant, pilots, controllers, birds, bees and whatnot.. have done to prevent it.