Part of the issue is less about tanks and healers in total, but about getting them into DF.

I'm a tank main, and I HATE Duty Finder. I'd stop using it completely if roulettes weren't so good for rewards. I know lots of tanks in the same boat.

Why is it so bad? Personally, I'm sick of carrying the living garbage DF gives out as "teammates". Tanking is not fun when you're top DPS. Tanking is not fun when your healer is AFK.

Tanking is fun when the group is behind you, and you're powering through. Tanking is fun when you can pull a billion mobs, pop HG, and watch the nuclear explosion of AoE's hit home.

Tanking is fun, DF is anti-fun.