Why is there no 2d, 3d or 4d life on Venus ?

[Raman]

The answer is that we can't see through the planetary sphere's fifth density vibrations into the parallel existence of lower density life on the planet.

Or 2d/3d/4d are not activated.

But it there is 2d, 3d will be aware of it unless hidden by some state and purpose, in this case you could be right. This would help maintain veil in 3d earth as well as prevent planetary 'colonizations' by earth's 3d entities.