The hobby is always evolving. There are a ton of reasons why people can't, or won't build. Calling them lazy is presumptuous though. It's a matter of personal preference, and I won't second guess someone elses decision on if they want to built or not, it's irrelevant. If they enjoy the hobby (in any way), that's all that matters. I am in clubs with guys that love to build but rarely fly. I chose not to build. Could I force myself to sit down and build from a kit, sure. But I don't enjoy any aspect of it, so why should I? Does that make me any less of a hobbyist? Someday I might want to do it, but not anytime soon. I'd rather pay a guy in my club for his craftsmanship, he enjoys the build, I enjoy the fly. Just like I pay someone to change my oil, it's a win win.

As for the build threads, I love them. I enjoy seeing something come together, I'm in awe of what some people can do both technically, and from a time perspective. Can't remember his name offhand, it's Dag something or other on RCG, he had a few builds that were simply amazing.