I think what Matthew says is very true, but there's just so much more in Internet than just the aspect of quality control.
If I think of it, I was not so much interested in tools themselves, but in everything you could make with the tools. And one thing leads to another: the learning curve for most woodworkers in current times is the same with small variations.
In scenario 1 you start with small, dirty and rusty tools from the local flea market. You learn, you clean them up and go on getting better quality used tools. You end up putting pictures of your renovated tools in the net so that the newbies could drool all over themselves and start dreaming about their own little finds from the junkyard. After a while you end up building tools, and as you build them for yourself, they are pretty and shiny and brilliant quality. Some people might try to copy you, but those who don't trust their skills will try to find factory-made tools that would be just as beautiful.
In scenario 2 you start with small factory made tools if you don't trust your skills in renovating them or just want to focus on woodwork. Many people who start this way jump to the scenario 1, but all in all the key is that you build, you collect better and better tools. And while you share your WIP photos, you tend to put the nicest tools in the picture (we all do that, don't we?). In the end it does not matter what kind of woodwork you present in the net, the tool is always there as well, and the followers are queuing at the toolshop door...
What makes woodwork so special then? I think that the popularity of woodworking leans on the fact it's so very easy to make a set of step-by-step WIP photos, make a short description and give people new ideas in the net. For example fishing is just as equipment-intensive hobby, but it makes no sense to take a dozen pictures of "this is me standing on the seaside with a stick in my hand"
Just a few ideas.
Pekka