I agree with OP.

Most Tank BiS lists are built on the premise of Parry > everything else after hittig Acc cap. The idea is that damage mitigation is more important than damage output.

However, the returns on Parry are piss poor. A tank that has 50 more Parry takes about 1% less overall damage.

It really doesn't friggin matter how your secondary stats are allocated, as long as you're Accuracy capped and you're not wasting too many stats by having too much Accuracy. Keep your Accuracy at or barely above the cap and you're golden. Parry is not #1.