Eh, it tells me that they're fan made doujins that try to give a alternate depiction of the world, as they usually do. Some people wanna make very accurate doujins where everyone is exactly as strong as in canon, some wanna make fun brawl's where people punch each other a lot.
I think the best thing about Touhou doujins is you can have things where Wriggle is a punching bag bullied by others, and others where she has strengths and skills that secretly make her extremely strong, as seen as in stuff like Wriggle vs. SDM. The variety of genres from comedy to horror, diverse depictions of the setting, it's that kind of thing that makes them so interesting.