Its a cliche/stereotype now popular meme for overweight “neckbeards” to only like Lolis and or catgirls. Which yes may be true but many of those types dont like it just the same and are happy with their babylon 5 or warhammer or any other hobby that exists from real boats to models. There is really no set standard intypes of people that like or create something.

Many normal functional people of varying ages create and love stuff just like this. We just have little feelings that say “no that cant be, its not right!” and many like to listen to that. They unfortunearly are usually the most vocal.

It is the main reason why i hate the “jokes” about it. All it does is slowly but surely become the mental image and association people have making normal people seem worse than they are which in turn leaves surprises like you are having now. No reason to treat or think of people badly for making or liking thing similar to this in my opinion.