I entirely accept that you might not want to send a spacship to Uranus and, that being the case, you would have absolutely no use for the Eisteinian model of gravity. I accept that utlity must always be seen in relation to a particular objective and that different people have different objectives. So I am quite comfortable with different questions. What I do not accept is that any answer will do, once you have asked a particular question. What we organise is belief.
Belief counts as knowledge when it corresponds to some kind of reality.
We use different words. We could use different images. But our different formulae are semantically identical. I suspect that this semantic identity is an inevitable feature of true beliefs which correspond to the same reality. Different genetic make-ups and different environments.