It's harder to accidentally reach porn on Reddit than it was on Tumblr ca. 2018. You could follow tags like #cute and #fox because you liked a cute fox picture and the next day get somebody's Sonic and Tails furry futa fanart on your dash because they used those tags.
I don't have the app anymore, but I'd assume you don't end up in r/GoneWild with 3 random clicks from opening the app as a new user, nor that porn is prominently in the default subreddits.