HD
I do agree with most of your post. I still will follow RA guidance in the situation you give, even if previously told of the impending traffic. What if in the crews haste to set up the hold they neglect to fly the plane and blow through their assigned altitude? I was inbound to KSLC last year and was told of a Lear that was to level a thousand feet above me. That was the controllers plan. however the Lear blew through his altitude causing a RA on our part. ATC cannot fly the plane, only fallible humans can despite whatever clearance they are given. That said don't be mad if you see a RA response to what you think is a resolved situation.
I guess now that your retired you don't have to worry about that anymore. Only what beer to drink and what time to get up