I make jokes frequently, and rarely get downvoted for them. They're rarely standalone. They're topical and non-obvious. Low-hanging fruit is punished here. Most jokes people happen to make are low-hanging fruit. It's like the reverse "lucky 10,000" effect: if you think something is funny, it's probably because it's novel to you. Meanwhile, the rest of us have seen that joke, on the internet, too many times already. Uninteresting comments go down. Also, delivery makes the joke: just like sarcasm, the medium isn't doing you any favors.
That's the sort of joke that you make and take your lumps for. Sometimes the feeling strikes you and you can't resist. Getting downvoted makes it funnier. The lowest you can go is -4 so it isn't even like you lose that many fake internet points for it.
I've seen enough of this crowd to not be surprised at any ridiculous thing that happens here. Like having a 50 page Very Serious argument back and forth about some minor, irrelevant detail, possibly having nothing at all to do with the actual article, but a simple joke gets downmodded because ZOMG HOW INAPPROPRIATE. Or lest we forget, the various articles about things this crowd clearly knows nothing about, like politics or economics, but everyone has an opinion about anyhow.
By the way, given the frequent gasps of horror which are heard here when people are confronted with the horrifying suggestion that Microsoft is an evil corporation and people should use Linux or BSD instead, along the lines of "but I might have to compile my own wifi drivers tho! egads!", or those who are appalled at the idea of system startup using shell scripts ("the barbarity!") or the frequent snarky remarks that C is a terrible, horrible, no-good "unsafe" language that is unsuitable for any use (despite virtually everything else in the world depending on it), etc, etc, it's quite charitable to describe this as being a forum for "Hackers." In many cases, it's more like just a bunch of pretenders and wannabes.
I read your comment profile, and know exactly what you mean about the "cancel culture." This is the first profile I've had here where I've actually managed to get a little positive 'karma' built up and avoid immediately getting downmodded into oblivion and run out on a rail. My very first account here a couple years ago, as a bright eyed noob, was literally shadowbanned within 15 minutes, which absolutely blew my mind.
The moderation system here is seriously broken, and has the effect of creating a toxic echo chamber of humorless trigger-happy goons. I've read a lot of complaints about it in various articles over the years, by names who no longer seem to be around. The response always seems to be EWONTFIX.
Indeed. The issue I had here was not that there was a joke in a place of solemnity, but that it was an old and low-effort joke that also didn't add to the discussion.