It's mostly a community issue not wanting or adapting to how they've played the game this whole time it leads to:

If you can't pull the whole first room of Baelsar's Wall, you're bad.
If you can't heal giant pulls and DPS as a healer you're bad.
If you haven't figured out your DPS rotation yet and you're level 60 you're bad.

You mix that in with over half the playerbase not knowing how to: Cycle CDs as a tank/Proper CD pairings, how to stance dance as a healer, how to effectively DPS as a DPS with all the skills you have, then yeah that's what we're left with today in common DF.

Hell I was in Baelsar's Wall yesterday, and we couldn't do the first big pull because the healer didn't know how to Esuna, use Asylum, Tetra, Benediction, etc, and the DPS was a BRD and SMN, BRD didn't use Foes and 2 CDs (BfB, IR), and the SMN didn't use Shadowflare or Dreadwyrm Trance. Did we succeed? No. I cycled my CDs, and used LD but the healer died before me and we wiped 3 times before we finally had 6 adds left.

I honestly wish people would learn how to at least play their class instead of coming into DF demanding big pulls and -15 minute clears when they can't even handle it back when Gordias was a thing. So from my perspective I don't blame the tanks/healers/DPS just whoever isn't playing optimally as this has been an ongoing issue since whenever and it hasn't gotten any better, so no I don't think tanks are scapegoats just the bad players who play those roles stick out more.