Well put, the fact this is required is IMO an indictment of what Facebook has turned into.
FB are not alone in this.
Re:Facebook Container for Firefox
by TameAntelope on Wednesday October 21, 2020 @11:00PM
(#24854492)
To be fair, it isn't required. The actual consequences of Facebook having your information has thus far been a benign experience for the vast majority of its subscribers.
Try Qubes OS instead, it gives a great peace of mind.
And when I finally fall asleep, I dream of internet without the monsters.