People suggesting STR for tanks aren't wrong, it's just misleading to passerbys reading the forums.

Tank priority is
Manage Aggro > Survivability > DPS and Support.
If you don't manage aggro, you're of no use to the party and are probably dead anyways.
Once aggro is managed, the goal is letting the healer keep you alive, focus on this.
If and only if the first two priorities are confidently met, should you start working on DPSing more and focus on whatever additional support your tanking job has to offer. More DPS means a smoother run for everybody, but if your healer is struggle-busing then it's not worth the trade off.