Some of the exceptions were for professions like Lawyers, Accountants, and Professional Engineers. There are already well established protocols for interacting with these people, so let's not complicate things with AB-5.

I'm sure some of the exemptions are not so cool though.

What have established protocols got to do with anything? The question at hand is, is Dynamex a good, widely applicable test or not? Yes or no? If it is, then use it. If it isn't, something is severely broken, which you plainly see with so many exemptions, and it should not be used.