This was one of the launch mistakes of 4e and one that was eventually fixed with Essentials; there was no "social player" class. We had a player who was a chore to play with until his twin strike ranger was converted to a scout, when he opened up. And another one who had historically been bouncing between D&D evokers and martials - and had one of the best experiences of an RP career dating back to the 70s with a Fire Elementalist where he could Just Burn Stuff.
Part of the point of a class based systems that you can give different players different mechanical as well as thematic experiences. And I consider it a serious flaw and case of unnecessary gatekeeping that there's no low mechanical engagement class to allow a friend to keep having fun with their friends when you already have a class based system.
If the core design of your system requires players to give a little bit of a crap, I’m not sure that’s a bad thing. Can other more dedicated players pick up the slack and toss out advice even here? Yeah. But as soon as you have Triggered abilities that go beyond OAs, you need people who are paying attention.
Like, the Fire Elementalist isn’t that complex but it’s still got the building of resources and stuff.