As a guy who really likes to bring elaborately overprepared scenarios to conventions When I Can ™, probably the reason you’re not into them is that there’s often no goal to the preparation. Like, “I wrote a module that seemed cool to me” always seems to be the motivation, over “I wrote a module that will help teach this game to noobs” or “I wrote a module that shines a spotlight on this really cool thing about this game” or “I wrote a module to really impress you with my great acting skills”. Before we even get to the possibility of a failed or C+ execution of an idea, we have to get past the possibility that there is no idea to execute past just “it seemed neat”.
Missing Velvet Glove and Chill were my two big (game playin) disappointments of the convention.