

IMO: A lot of this is groundwork for a parallel construction narrative. “Of course our numbers are better than theirs, we would have won every election ever if it weren’t for rigged votes.”
The primary goal isn’t to win by driving the actual vote count down, though it certainly helps. The actual goal is to create the widest smoke screen possible, so that any time the numbers look strangely in their favor it’s because there are fewer illegal immigrants “voting”. Deportations! Better ID verification! Blue vote numbers are down, and it’s because the Trump administration fixed the system. Just ignore all the fact based studies that showed how few votes were tallied in error.
Their demographic doesn’t need proof for what they want to believe, just a plausible narrative that they are already groomed to accept.

This is why you should always say “and then he defended it publicly” in the same breath.
Will you win the argument? No. Will you increase the amount of mental gymnastics they perform for your own personal entertainment? Yes.