Right. The normal "the self-damage doesn't matter" argument, just phrased differently, as if that changes anything.
I'll grant that when the self-damage doesn't matter, it's actually a good heal.
But when the self-damage doesn't matter (outside of divine shield), if you're not a dumbass you're not casting heals at all; you're dpsing.
Only cases I can think of where it makes sense to use it while you're not moving is il'gynoth, to just quickly heal people when only a handful of guys are taking damage, or on xavius to kill yourself. Indeed, these are "situational" uses, but they're not "situational" in the sense that you "situationally" "weave" lotm into your casting priority in order to save mana, as the guy I was responding to asserted, and as you implied you agreed with since your reply would make no sense in response to me otherwise.