While this statement in itself is true, I want to add that there is no really such things as “dense” or “density”.
The physical universe and physical matter is not really dense, it just appears so to the consciousness that is focussed on it.
And the astral planes can appear super dense as well, but follow different “game rules” and “physics” than what we have here on the physical plane.
All planes can appear “dense”.
I think it would make more sense to replace the term “density” with “the potential speed at which the environment can change and shaped by consciousness”.
So like you said, I think that “higher vibration” is better explained when we don’t call it as “less dense”, but as “the environment can be changed more easily”.
And with regards to Newtonian physics, this is part of the illussion too.
These Newtonian rules only apply for as long they are allowed to be applied by the consciousness that is making the physical experience.
When you, as a physically incarnated being, switch timelines or stuff is being re-arranged physically in the background for your manifestation, all of those Newtonian rules instantly go out the window and are instantly overriden by actual game mechanics. Consciousness that manifests reality (and it always does so), can and does ultimatively override ALL that is appears to deterministic.
As an example, someone gets into a car crash where the car is completely smashed into a ball of metal. Now according to the “low vibe” of the physical body and the Newtonian physics rules, the person inside the car shouldn’t have had any chance of physically surviving this, however due to some decision from the person’s Higher Self, Guardian Angels, Spirit Guides etc. they decide to intervene, instantly changing the physical rules in a way that a perfectly alligned safety bubble is created around the body of the person who is in the accident and the person “by a heavenly miracle” coming out of the crash without a scratch.
Such “miracles” happen all the time and are just proof that Newtonian physics are part of the illusion.
I have personally experienced such miracles myself where so called “physical laws” were temporarily nullified in order to save my physical body.
Determinism is a complete illusion and part of the game design.
We inside the simulator are supposed to believe, that something like “determinism” exists.
It is part of the illusion where you “have to take the physical world as serious” and “believe that it is solid”.
So actually, determinism does not exist at all, because The Source (the ultimate all consciousness) has absolute Free Will about itself and its creation.
Absolute free will implies that determinism can only exist as an illusion in the first place. And “miracle events” like in the example above are proof for this.