You have such a way with words... Let's break down a few things.
- STR accessories on tanks became popular when people figured out it's synergy with WARs. WAR's a self healers that need to deal big damage to heal. It works for them. The other tanks don't synergize as well with STR.
- DRKs should most definitely be stacking parry - period. They have a -10% outgoing damage off GCD and an off GCD stun that rely on parry procs; which equates to more DPS. They synergize with it and stack it exponentially with moves like Dark Dance.
- A lot of people, like yourself I am assuming, wet their pants when they see a big number on a crit. Parry is not something that is visually exciting, but long term, it makes a HUGE difference.