Why Speed Pulls?

[Sousoulsu]

[Snap]

This is a long one, so I may have to answer it in multiple posts.
1)I've healed i90 Tanks in KotL, WP(H), and AK(H). They did not need to use any defensives whatsoever. The only thing that would make them need to do so is if they were to multipull, which they opted not to do.
2)Yes, I keep track of the group's relevant defensive cooldowns. Tank CDs, Apocatastasis, DPS' e4e (if I notice they're using it), PLD's cover, etc.
I find it second-nature. I understand many people don't go this far(possibly why they have trouble with and dislike speedruns), but it's a good idea to keep track of major CDs.