Earlier quoted context omitted.
I think that "life is objectively meaningless" is an unfounded statement. You should start by proving that to be true. I also think it preferentially loads words like "objective" and "existence". It also doesn't correspond to any common sense meaning of the word "meaning", since a servile dog's life is meaningful, a doctor's life is meaningful, and so on, in normal speech. If you mean to say something like "all exist…
There is nothing to "prove" here. I mentioned "Occam's Razor" to imply that among competing hypotheses the one with the fewest entities/assumptions is to be preferred. Here that is "life is objectively meaningless" over other competing hypotheses. There is also some inferential reasoning/evidence here since we know that from the pov of the objective Universe our existence on this planet makes not an iota of differenc…
A more complex hypothesis isn't useful until you come up with a method of testing that will distinguish it from the simpler hypothesis. That doesn't mean you have disproved the more complex hypothesis; just that you shouldn't use that hypothesis until you actually have a need for it.