Is there a need for death in fourth density?

[Ohr Ein Sof]

If it's possible to move directly to fourth density, how will that work in practice? In my view that's simple! The higher densities already exist around us and within us ("the kingdom of God is within you"), and it's just that in third density there is a veil blocking the higher densities. So our biological bodies will start to change, similar to some New Age teachings, and the result is a transformation from a body of flesh to a fourth density body.

And in the beginning the fourth density body will look the same as our third density body, but then we can start to change the body, only a little at first and then as we teach/learn more we can access more capabilities, even things like levitation ("meeting Christ in the clouds" as it says in the Bible).

So, your idea is that we can transform these dense, sick, dying bodies into something that suddenly can hold 4th density Light? Idk. Even the most enlightened Masters have died or let go of this vehicle to be in a more appropriate vehicle that corresponds to the density they reside.
Personally, there is no amount of meditation that will repair this body and even if there were I no longer trust it for travel like the first car I had when I was 18 years old; no amount repairs to it would I feel it was safe for long distant travels.