Earlier quoted context omitted.
Ah really, there’s no life on the sun? Hey, come to think of it — that was my point exactly!
Your point is pointless. Life doesn't expand to take advantage of new resources in environments where there is no life. First you need life.
The point others and I are making is that life does not expand arbitrarily, or in a weaker form, the life that may expand will be a much less desirable environment for us humans than the present.
Even though you deny it, we can very simply create environments, right here on earth, where life as we know it will not be possible. Look into an operating steel smelter for example, just to remove any subtlety and ambiguity.
Sure, maybe ‘Science’ can replace all of our biosphere with extremophiles, but I for one do not desire to live in such a world. I like trees and birds and mammals and lizards and (you get the point).