Yeah, I ran into the same attitude with my coding group. We started open-sourcing some basic project templates instead of hiding them. Suddenly, more local folks got into it and started adding their own tweaks, which was awesome. It pushed me to clean up my own code big time, just so I could explain it properly. That feedback loop made my projects way better, no joke. Hoarding the good stuff just starves the hobby of new energy.
Your note about other blowers saying it's a bad move reminds me of how many hobbies have this gatekeeping thing, like with vinyl records or home brewing. Hoarding knowledge just makes a circle smaller, but sharing tricks can actually grow the whole scene. It's a pattern that holds back cool stuff from getting more popular (which is a real shame).