It's about the community. Which appears to be lost on you, so it's safe to assume you never played Vanilla WoW. You take LFR, group finder, etc as "content". Sure it's easier to find a group now, but you also have no proof that the people you are grouping with aren't bots. (Extreme hot take there, but you get my point... hopefully)
Also back in Vanilla we had Thottbot and maybe a few other fan sites that helped you figure out how to do quests and dungeons. Now there are thousands of websites and thousands of add-ons that just automate your play. Oh a boss is about to do this move, this add-on tells you to move or interrupt. It's brainless.
Did you ever just consider that Classic isn't for you and you should stay on Retail? And leave the people who wanted (and are enjoying) Classic alone?