It is SE's objective to make content engaging for as many players as possible. Excluding people who aren't skilled at party forming or don't want to stand around in an instance yelling for 20 minutes isn't productive. Especially when the rest of the game has a "pick the thing you want to do, wait for it to start" mechanic.
I don't know why you think putting the onus to make something accessible is on the player.
The fact they COULD have made SOMETHING to help those people out, even designed the system better to make it beneficial to pick up other players besides similar level players is a failing.
I'm NOT determined to hate it, I want it to be friendly to everyone and it wont be. I've got mine, but it wasn't very fun and I don't see it being fun in the future. I've got suggestions on how to improve it and telling the company "it's ok, the people should just deal with it" is very selfish.
Why are you so determined to let obviously restrictive and short lived things stand when they could be better?
I get you enjoy it and like I said earlier, have at it! Grind those levels and get that gear! .. but people are going to be left behind and feeling crappy about it and it could be fixed without ANY detriment to the experience you already had. It might even make it so more people are playing for the next step and you'll get that social interaction in spades.