Yes, we disagree and here is why. You view LotP as a cooldown, used as when it's most effective. I view it as part of our AM, used as often as possible because smoothens damage intake. To ephasise, you use it to recover from tight spot and I use it to never get to that tight spot where you recovered with it.
Your scenario is possible one, but only in theory. We need to consider that Blizzard wants to tanks to have 60-70% uptime with ShotR, and that Tanks should slowly take damage, instead of wild HP pingpong. Also Blizzard has stateld that healers mana should matter and be part of their g