Actually I do talk about all sorts of musical things with my musician friends in real life. Everything from technique to who we are listening to. Here on SZ it seems the topics of interest are mostly about gear. Nothing really wrong with that....

As to why more people don't post more videos and recordings, well, maybe some are embarrassed? Also it can be kinda of frustrating when someone shares their recording or video, and they get very few comments. I know because that has happened to me. I try not to take it personally, but I feel like why even bother sharing if hardly any comments but so many view.