in there if at all possible.

True, there shouldn't be any solids going down the shower drain (besides strands of hair). That means you could probably get away with it. But I hate to do a project like that that depends on no one using it in a way I didn't anticipate.

I mean, what if someone installs a garbage disposal on that drain, and prepares dinner in the shower while they bathe?

https://www.youtube.com/watch?app=desktop&v=NMQTg4Y0YT0&pp=ygUeS3JhbWVyIHNob3dlciBnYXJiYWdlIGRpc3Bvc2Fs