Elitism and addons or other means of excluding people didn't start with BFA. Whether it's people asking for 1200 io for a +5-10 on "alts" or AOTC 370+ for normal/heroic "blast" the community itself harbors pretty radical elitism in large part due to people thinking they're better than they are or thinking some arbitrary things determine success rate for certain activities.
With things such as boosts and carries being so rampant in the game today you never REALLY know a person's true "skill" or experience level until it's possibly too late, or so much time has been wasted it's not worth it in the end.
For example, Timmy has a lot of gold. Timmy has school and homework as well. He cannot grind M+ or join a dedicated heroic progression guild. Timmy sees people flooding trade selling these things. He buys M+ runs weekly, and AOTC once. These addons will "Reward" Timmy simply because he "did" a lot of +10s eventually.
The same exact thing applies to ilvl as well. Being declined entrance on an alt, or even main for some people, to a PUG Heroic or Normal raid because your ilvl is "too low". Or the group leader is a "5/8M raider!!one" but just so happens to be on an alt, and essentially needs carried, thus producing a hypocritical scenario simply because he made the group by clicking a few buttons.
In a perfect world the need for so many PUGS for many casual players would cease to exist, and the wannabes could sit around figuring out other ways to feel good about themselves. And no, I am not one of the people who needs to PUG or gets declined due to ilvl or io score or whatever, before you jump to conclusions and assume I'm some salty casual. I do not pug.
The amount of times you see ACTUALLY good players doing this is low. I'm aware some top end players who stream do this with "community" runs or "Viewer raids" and have a higher than needed ilvl but at that point it's more about taking people to serve the streamer's needs or what they feel is best for the run to be as smooth as possible.
Asmongold, as popular as he is, is likely one of the WORST possible streamers to look at for this sort of thing, as he frequently requires absurd ilvls for ANYTHING he does, and he's always being carried while he "Entertains" his stream and reads chat. I'm sure there are examples that show both extremes, for better and worse, but I don't watch enough lower end raiders on stream to know this, forgive me. I chose one I knew a lot could relate to or may have seen themselves.
That's all that comes to mind on this topic, sorry for the blog post I don't usually post this long