Your argument again misses the point.
Ion said in the recent interview that the friction of the "pre LFD" days were actually good for the game, not how it necessarily interacted with a given content.
That's just the thing, it made people around you disposable because you could just hit a button to remove them and replace them with new ones if their attitude or playstyle didn't suit you.
Similiarly, people can just leave a group if it doesn't suit them.
And i predict a similiar situation here:
It makes the community easily disposeable, people think they're being held down by other people in their raid, hop to another one, the previous raid now needs to recruit new people, re learn the fight with those people, progress becomes ever slower, more people start to ditch the raid and so forth.
This can easily turn into a vicious cycle.
That's the one touching point of your argument: It only works in very easy content where basically anyone is able to participate, not a difficulty where Bosses requires up to 300 attempts with 4/5 being there since Pull 1.
Here's the unpopular opinion of me: Requiring a modicum of commitment is better for the longterm health of a game mode and its respective community.
Yeah, altough having a single person holding the crown in an Arena team is also shit.
Friend of mine lost like 3 Rank one titles because leader kicked him out of the team shortly before Season end.
To be fair, said friend has a bit of an attitude, altough that's not exactly rare among highend PvP'ers.