Ironically the only person here who keeps bringing up the word 'proof' is you, as well as initiating the use of the word 'disprove' because of course, disproving is completely different from proving.
A counterexample points out implications in a previous argument and it is not exempt from being or having a premise. An argument has premises and a conclusion and therefore implications, otherwise you are communicating nothing. "Conway's game of life creatures became sentient." is a premise. "The universe is a simulation" is a stated premise with implications. It is still an argument with a premise and a conclusion, which you illustrate above. It is not magically exempt from relying on inherent assumptions more than any other form of human communication. If you think you are immune from assumptions, while others are making 'infinite assumptions' when they provide a counterexample, then we are at an impasse, because that is called 'typing left-handed'. And at that point continuing forward is 'beating' a dead horse, while typing left handed. Grandiose droning about 'believers' vs 'atheists' (which also contain assumptions and dichotomies) also fit nicely into that category.
There's nothing wrong with typing left handed of course, other than that it is boring to watch. And not knowing some of the better religious philosophers from the last century who understand these problems better indicates that it's time to move on, watching dead horses getting beaten isn't my thing.