There is a lot of value you can get from BN, most importantly opinions from all over the world (not just local knowledge/tradition). It may not always be useful, and can often be contradictory, but you can't discount the value of getting input from such a diverse group of bonsai people (some of them you probably could not afford if you went to them directly).
On the other hand, face to face and hands on, has value that you simply can not equal via the internet, so a local club, group, or mentor is a good thing to have and complements what you get from BN.
Thanks, that's exactly what I meant.
Short story:
I've always been interested in plants and other cultures.
A friend of mine was a fan of Japanese culture, he made me discover Kawabata, Mishima, Mizogushi,... and also bonsaI. His were about as good as a beginner's in the 1980s in France, but to me they looked wonderful, and I took the virus.
I "practised" for about ten years, from books.
Then in the late nineties, I bought a second-hand computer (MacIntosh Performa 200 I sold at a a carboot sale for somethg like $10), and very soon, came the internet and the first forums. There I found the FFB (Fédération Française de Bonsaï) and a FFB local club.
I learned more in a few months than in more than ten years!
Taking part in another community-oriented activity on the same subject, even if it's "virtual" just adds to what you know, shows different options and opinions. Yet, Here, where I live, what my friends
/mates/pals/copains-copines/Freunden-Freuderinen (?) D : sehr schwer zu remember mein zwo yaren Deutsch wenn ich war 12-13) can teach me is indispensable.