Lots of things I'm really interested in are looked down on by other adults I know. I love animation but it's seen as something for kids. I love video games, but that's for teens, incels and nerds. And I love birdwatching, but that's for boring old people. Oh and also whatever my ADHD is making me hyperfocus on at any given moment. I could talk about any of those topics for ages, but more often than not people aren't interested, so I keep it to myself.
My guess is Reddit is doing this to temporarily raise traffic. It's like rage bait. They know they're pissing people off and protestors will flood the site, but traffic is traffic. If they can demonstrate engagement it must be good enough for the upcoming IPO.