From one tank to other tanks..STR Gear is not a thing anymore..Get used to it now!

[Singularity]

when a tank buster brings them down to 5% health rather than 45% health no amount of calculations will tell me STR is better. Sorry.

Why does it matter whether they are at 5% or 45% though? They're still alive either way, and the absolute number of HP they need restored to be at full is the same.
So what is that extra 40% HP doing? well, you can think of it as one or two heals you don't have to cast over the course of the encounter, but if you put that time towards healer damage instead, you'll almost certainly add less party DPS than the tank wearing STR would (possibly an exception for a Holy or Gravity on a large number of targets in a short encounter)

As a white mage, i can tell a remarkable improvement with tanks who wear tank gear. And I can definitely tell when a tank is a "i want to really be a dps person" because their health drops faster than the 1929 Stock Market

If they "want to be a DPS", then they are most likely not using their cooldowns very well. That is why their HP is dropping faster, remember, VIT does nothing to reduce incoming damage at all.

it has nothing to do with how I want them to play. Every possible bit of evidence clearly shows that tanks are suppose to wear Vitality gear....not STR! They even stated that in patch 3.05 that all STR based accessories are going to be locked out from tanks....so when SE is saying and doing these things....how is that solely my opinion?

The thing is - we're not bound to do what SE intends at all. SE set the rules of the game, anything we do within those rules is fair play. If SE doesn't like the way we as a playerbase play the game, it is within their purview to change the rules, but until and unless they do, their intentions have no binding hold over us whatsoever.