The context of this conversation is probability of generating life. Debating theories on dark energy isn't relevant since it's not dense enough to generate life.
The context isn't relevant when I'm correcting a fact, at least as we/I currently understand it - the universe is infinite. I'm wasn't making a statement about dark energy, or life.
You are ignoring the spacetime part of the universe, which in definitions of the universe being finite or not, is probably far more relevant than the mass.