I understand all of the above, but the case made for prioritizing dps secondary stats was made under the conclusion that the increased dps was actually a net gain of damage mitigation, over the parry stats damage mitigation.
^ if we assume this is correct then follow me down this rabbit hole for a second.

So IF you are tanking Turn 5+ and your HP pool is not an issue. I think it would be safe to say that migrating a few points out of VIT and into STR would be a significant increase in effectiveness.
Especially if you have now stopped gearing for parry and started boosting crit and det, which will both be further boosted by more STR.

I am not suggesting going +30 STR and 0 VIT. I AM saying that +5 STR/ +25 VIT +15/+15, ect are now worth looking at. Again this all depends on the fight, and your healers.
If you are not dying from boss hits, then adding STR seems like a very legit thing to do. Especially with changing 2ndary stats to dps.