Depends on what you mean by "endgame content", but sure. Especially once next patch hits and legendaries become a lot easier to obtain. Also keep in mind that BfA is quite some time away still.
Basically, yeah. Unless you WANT to do it, for WQs or whatever. Personally I don't bother with most of it, I do a few Broken Shore here and there but I never finish it. Suramar I never go past the very very very first part just to have access to Shal'Aran and thus the Emissary if it's up.
It's farmable to an extent, but not infinitely so. Just doing Invasion Points a few times a day and farming a rare here and there (ideally as part of a WQ) is usually enough to buy one item a day. The weekly quests are more on top of that.