It’s not an incorrect assumption, it’s a basic estimation based on how many categories there are in total and how many of them are of fun categories. There are 8 major categories, and only 1 of them is for fun, and some in the fun categories are put there only as a disclaimer. They don’t want buyers to believe that advises for health and fitness, relationship or life can be taken for granted, even if they are clearly not something fun, but rather useful.
It’s also something that comes in real life as well. How many people do we know that are performing in art, music etc, compared with basic professions like plumbers and clerks? That does not mean that the fun categories are not meaningful, I am just saying that being successful at one implies talent, passion + a lot of work, while regular service providing jobs can be done only with work, even if it’s recommended to have the first two as well.
Let’s take a TV show for example. How many actors play in it compared with the people behind it that work at writing, production, advertisement and more? One movie can provide even thousands of jobs for regular service providing people. Let’s take one famous singer. They are one, but they have a team of hundreds of people that support them and make their success possible. The examples can go on and on, and I can even prove my point by the percentage of sellers that are active into this forum and work in a fun category vs the rest of us.
I am sorry if you took this as an offense when it clearly isn’t. If anything, this is a compliment, because being a freelancer painter, singer, cartoonist or whatever, is something rare and beautiful.
And tbh, I don’t see how can “spellcasting” be considered a fun category, except for the fantasy part in it.