You don't need to explain anything. Go ahead and work under the assumption I know all there is to know about the PLD job class. I can still tell you that cure cheating in this day and age is generally a waste of both time and MP. You gain significantly more Enmity overall by TP'ing and using your accumulated TP to launch Chant du Cygne (It should always outdamage Sanguine/Atonement) than you would interrupting your attack rounds for unnecessary cures.

I'm not saying a PLD shouldn't cure itself if it takes damage, but you are much better off avoiding taking damage in the first place (Utsusemi) and only curing when you actually do take damage (or someone else does). Blood tanking is only viable when you can realistically reduce the damage you take to the point where you are producing more average Enmity per second than you lose by taking damage.