While the outline does include a list of skills that is nice to know and would be beneficial to many professional keyboard players, I'm not sure that it is really necessary. I'm not saying the list or proposal is stupid, of course -- maybe just a little bit overkill.
First of all, we're playing music, not doing something where an error could be critical or life-threatening, such as being a surgeon, managing large financial accounts, or servicing the safety systems of automobiles. So I don't think some kind of official certification would be necessary. As I understand it, someone aspiring to play music professionally generally auditions to whoever would be doing the hiring, and if they like the talent and performance of the keyboard player, then he is considered for the job. Additionally, there are specific requirements for specific keyboard-playing jobs, so that a comprehensive knowledge of all that the OP listed is not necessary for all musical roles.
I do think an understanding of music theory is important, but I recognize that there are musicians who've made a ton of money by playing strictly by ear.
If someone is going to be a piano player, then knowledge of styles is not important. While I do not yet play professionally, I only use styles for the background drums, so again, in that situation, I would not need extensive knowledge of creating or editing styles.
Knowing different types of synthesis is, again, nice, and would be important for anyone wanting to create their own sounds. But I'm sure many people make money playing on arrangers and either use the factory sounds or just make basic tweaks to things like reverb, chorusing, and other effects without knowing the ins-and-outs of oscillators, filters, FM-operators, or other synthesis technologies.
The keyboard output skills listed would be necessary to someone who wants to work as a studio musician or sound engineer, but not really necessary for someone playing live gigs. And there are already classes available for people who want to work professionally in a studio.