There's an explanation on front page of mmo-champion how does that scaling thing work. It matters. Your HP matters, but the difference isn't as huge as it was before.
OT: Well it's the same as wanting to get into mythic Uldir with 330 ilvl when you haven't even cleared normal. You don't have to go into 2,1K RBGs right away. Do some arenas, cap conquest, you'll get gear very fast.