If you feel like the sum of game play is your job kit and so there is none until the full kit is unlocked, that's your problem. I don't know of any MMOs out there that allow you to have access to your full job kit day one.
There's more to content than end game raiding. Who is the real content-oriented player: the one that only cares about raiding, or the one that does a bit of all content?
And yet I can be doing it with my friend, especially if I have NG+ enabled to be working on the MSQ with them or using an alt created to level with them. Many times during cutscenes, we're talking in party chat or Discord about what is happening in the cutscene.
It is not difficult to do MSQ with friends. The only annoying part is having to break group to do the solo duties. SE should really fix that so we can help coach our friends through them without having to use a third party communication tool (which is a great option for those who like using them but shouldn't end up near mandatory).
Maybe those complaining should stop being selfish and allow their friends to explore the game at their own pace just as they originally got to (unless they had been recruited to the game by a similarly selfish friend and didn't know how to enforce boundaries).
If the friend has no interest in the leveling experience, then the job boost and story skip are available. Keep in mind that SE is aware that the length of the MSQ can be a problem for players new to the game and they've announced they're working on something to address that. Hopefully it will be ready for 7.0.
WoW stopped adding cooperative quests years ago and moved to solo questing. I can remember the days when you needed to get together a party to do the quests at the digsites in Darkshore and Loch Modan that had the elite mobs, or the quest to get the staff part off that one mob in Desolace that needed to unlock the shortcut portal to the depths of Maraudon, or the worgen quest chain in Grizzly Hills. I remember that multi-part quest chain in Icecrown that required a standard 5 man party to complete - and required everyone in the party to be on those specific quests or phasing wouldn't allow them to progress together.
You don't need help on the open world quests in WoW these days anymore than you need the help here (unless you're playing Classic). At the same time, there's nothing to stop players from doing them together if they want, same as here.
Cooperative play shouldn't be forced - it should be a choice and both games now allow players that choice. If I want to do the MSQ with a friend, I can outside of those solo duties. There's nothing to stop me other than having a lack of desire to play with my friend.
I think your problem is you're so focused on combat as being the only form of game play (which it isn't), you overlook the value of shared experiences with friends whether or not combat is involved.