So this was answered in the 'doesn't make sense' post but I'll post it here so the word gets out.

HP inflation from player equipment and our choices doesn't exist, no.

HP inflation from SE deciding how much VIT to give the next tier of accessories does exist.

Say that they give us back the old 0.45/0.45 formula for our attack power. It feels good for awhile. Then they decide that we're doing too much damage. How do you tone it down?

Easy answer is lower the amount of stat gain on the next tier of items. But if this is tied to VIT, adjusting that vit down lowers our hp, which causes them to have to re-tool the fights they may have already had figured out for how much damage to put out on the tank and how frequently.

The same in reverse. If we're not doing enough and they want to boost us? Increase the vit gain on accs, but now that gives us more HP than what they balanced making the raid/damage values on.

So how would they have to adjust this with VIT tied to attack power? By constantly going into the attack power formula and making minute adjustments to how much AP you get from vit.

Easier solution: Keep VIT away from dictating AP, use STR only.

The logic is sound, we just need them to increase the amount of AP we gain from STR from 1:1 to 1:1.x, or add STR to our right side in the full values present on DPS accessories, and adjust it from 1:1 to 1:0.x, to keep us permanently x% behind DPS attack power that will always scale with them, preventing the necessity of adjusting enmity arbitrarily down the line.