I think there's an element of responsibility that some people feel when they respond. If you're asking for a very niche solution that is likely to create other problems in the future, should anyone else look at your code or refactor it or rely on it, or should you forget how it works, perhaps people are going to be less inclined in helping you craft it.

If you still want to craft it, that's okay, but you have to expect that some real percent of the answers are going to be those folk who know what the tried and true solution is, often because they've lived through the reality that you're attempting to create and they've dealt with the aftermath of doing it special and different.