This is actually allowed on steam? It's always been obvious they're hypocrites, but lmao.
Steam doesn't actually check games for disallowed content 99% of the time, they just look for images confirming it or some kind of official oopsies confirming it. However, they also acknowledge "All Ages" versions so that just makes it harder for them.
There are actually a ton of games on Steam that aren't technically allowed but get away with it with an All Ages version you can patch like has always been the case.
Most of the games that get removed usually aren't removed for random reason, they take place in high school or have under-age looking characters and so Steam just makes an assumption and bans them.
They really aren't hypocrites, you can see their mentality quite clearly. If a random user can reasonably stumble onto a game and immediately know or guess it has disallowed content, then they can argue Steam is willingly supporting it.
Anything beyond the line of good faith, so 99.9999999% of games that just use patches, are fine.