Your sentiment is increasingly common. However, Hans Reiser's conviction for first degree murder of his wife has not eliminated his name from various filesystem projects, let alone caused the code to vanish, so maybe there should be a bit of cognitive dissonance there?
My impression is that ReiserFS was just sort of gently dropped due to disuse, disinterest and lack of maintenance. That's about what I'd expect - nobody wants to touch it, but nobody expects anyone to signal their disgust either, because it's not in doubt.
I haven't been paying attention but it looks like it was followed up with Reiser4 and Reiser5?
https://en.wikipedia.org/wiki/Reiser4
https://www.phoronix.com/scan.php?page=news_item&px=Reiser5-...
Reiser5 surprises me though. I didn't expect it to be that uncontroversial. Guess CW topics have skewed my perception.
But more importantly, the story of Hans and Nina Reiser is of the kind that the various forms of fashionable fascism over the past two decades did not find interesting. It's not the act that makes people make other people remove references from software projects - it's how the act ties into current hot topics.
Possible alternative hypotheses I'd consider to your logic - maybe people don't care because it's old news? Maybe people just think of the comedian when they hear the name? Maybe people do care and it just hasn't hit HN?
People mostly get cancelled by committing the latest heresy.