Do you think the same goes for the Jovian planets?
My theory was that life capable planets have this type of core, non life capable planets do not.
So, until we can determine if those planets can and/or do support life, I couldn't say for sure.
My guess, is yes.
Mars, maybe.
Venus, probably.
Pluto, no. (don't think it is really a planet anyway. )
Mercury, no. (mercury, same category as pluto)
Those are my guesses. And truly, it is all idle speculation.