I’ll accept it

Well yes. A model is just describes reality, the tools used in the description govern how accurate the model is.

e.g. the speedo in your car, is a model of reality. Obviously it only models a very tiny part, but depending on the quality of the tool; it is more or less describing reality covered by the model.

This is a concept that has been discussed for a long time ; you are in good company contemplating this fundamental paradox.

First of all.
Life has no inherent meaning; there is no grand plan or objective purpose to your life or any other persons.
Thus; what you choose has meaning is objectively meaningful (to you).

On a grander scale. As far as we know currently, we are the only example of advanced intelligence in the universe. We are almost certainly not; but we have no evidence at this stage. This is objectively meaningful; for humanity as a whole, if you choose to participate in ensuring the continuation of the only example of intelligence is totally up to you. As long as some people choose to continue the species intelligence continues in the universe.

Nuke it from orbit, it’s the only way to be sure.

If it makes you feel better.

I know nothing about you, but that is enough to make me hate everything about you and what you stand for.

Unless of course we can find a common enemy.