1. "Since Size Kink will always be horrifying for someone it's fine to be included as a theme", by that logic it SHOULDN'T be, because it'll be always be included no matter what, otherwise you might as well put "video game" as a theme since it's a chance to celebrate that.
2. "Restriction" is not "restrictive". Whatever creative stuff you can do with the theme, you can also do it WITHOUT the theme, logically speaking the theme is only narrowing down the possibilities of what you can do. I know and agree with all the "limitation sparks creativity" stuff, but I was strictly replying to "we didn't want folks to feel the need to take the theme too seriously" with "It shouldn't feel like a restriction - more like a challenge", not the part of "I find Horror as a theme hard and boring to work with".