I was in a commercial aircraft where we disregarded the RA because the traffic was in sight and the human brain was capable of assessing the threat (now visual) rather than a warning of an unseen threat.
Unseen threat or any doubt, then there's no doubt - RESPOND
But firstly 'we' weren't there and secondly surely we must accept that humans can outthink an arbitrary machine - otherwise why are there humans still in the cockpit?