My read of that was they were going to just remove it and tune everything to protect-doesn't-exist levels.
Then Yoshida's deep Final Fantasy fandom kicked in and he saved Protect because of its steady presence in the franchise, kept it in game, so they keep tuning raids and crap around Protect existing.
So basically healers have to waste a cross-role slot on something that could be patched out of the game entirely and change nothing aside from freeing up the role slot.
Healers would have more choice and freedom if they removed it from the game and nothing else would be impacted, but here we are.
Protect has never been a thing in Final Fantasy. Seriously it existed in other games I played but I never used it
Is this a joke?