I've been in a few threads lately that talk about prepull regens in dungeons and how this causes unnecessary stress on the tank. There is even a whole thread dedicated to this conversation now (which is fair, everyone has problems to share on a forum) but what I think is getting muddled is the difference between a prepull regen (or 'pregen' as it's been called) and a mid-pull regen.
I'm going to denounce pregens right here because a real pregen is stupid and almost always overhealing. I'm also going to say that I'm sure some people still do legit pregens and those people are wrong. Premature defense of myself aside...
The start of this issue lies in the tanking community - some of you pull single packs, some pull from boss to boss when it's available to you (looking at you Shisui) and some of you vary between these extremes in a single run. I understand that you recieve pressure from DPS and healers alike to play certain ways, sometimes even in contradiction to each other, but ultimately you are still making these decisions and thus are responsible for them.
Because of this healers rarely know what to anticipate in terms of a pull and as any WHM or AST worth their MP will tell you regens are the first line of defense we have to extend our DPS uptime. If we think, for any reason, that you've stopped to set up shop and kill the things we are going to regen you and get to work melting mobs. If you then decide to keep moving that regen is not a 'pregen' for the next pack but rather a regen for this fight I thought we were doing that you're running away from.
I once had a tank who layed down a waymark where he was stopping the pull. It didn't help much the first time because I had no way to know what it meant but each pull after that was nice and smooth. I'm not saying this needs to become a thing but it certainly was helpful.
The next issue that needs to be addressed is that sometimes your tank is going to die. If we have just ended a fight where I used Swiftcast, Tetra and Bene (so most bosses or larger trash pulls) I have no large insta-heals for you. My choices are limited to regening you on WHM or trying a Cure II and hoping you dont get out of range/around a corner/so much of a lead on me (because, lets face it, you are probably sprinting) that I can't catch up and heal you enough once everything starts fully smacking you. I'd rather regen you and catch a little aggro than have you die and us wipe because now half the enemies in this dungeon are looking at me like dinner.
My point in all this is that there are multiple reasons a tank may find himself walking into a pack of mobs with a regen ticking on him and not all of them are lazy/stubborn/stupid healers. I regularly do this now and it is generally not an issue unless the tank is so far ahead of me I can't catch him because there are no enemies that are killing me with auto attacks before I make it into Flash range and he is probably in the middle of generating AoE threat anyways because megapulls.
Remember guys- there is more than one side to every argument.