One of the main aspects of the subreddit I enjoy is the monthly review/help threads. even though I never actually posted in one for help, reading through the reviews left for other people’s games always felt really helpful as someone starting out with the game!
This community isn’t particularly active (yet) but I think part of that has to do with the relatively limited amount of Go content there is to post on a daily basis. I think promoting more discussion and advice threads may help to grow the community here!
I’ll go ahead and post one of my games in the comments, and I’d be happy to look over anyone else’s, although right now OGS puts me at 15kyu so I’m not sure how helpful my analysis would be.
I don’t think they (or you, or me for that matter) should memorize tons of joseki - you’re definitely right. But, I think it’d help them see some common strategies for approaching the corner safely. Especially given that Tenkuucastle’s approaches ceded so much ground white. More about getting some idea of what’s possible in a good corner exchange than perfectly executing a joseki.