I can see where you're coming from.

I'll be honest, when I read the initial comment I interpreted his question to be closer to

"stop Meta from collecting my data to a meaningful degree"

vs how you've interpreted it -

"reduce the amount of data Meta tracks even if only marginally"

That's why the response saying "nothing" made sense to me, because blocking the trackers only has such a minor effect on Metas tracking.

Thank you for explaining, I appreciate it. I could see we were talking past each other, but I wasn't sure how.

Then you have a very easily confused process yourself. They did not make such a declarative statement as you suggest. They just said that blocking them is still a good idea even though it's not going to stop Meta from knowing about you. Being able to see the details in someone's comment is easier when you don't have a preconceived agenda