Website design is also a professional service when done by a professional and not by a hosting service that provides tools for the client to design their own (WordPress, Wix, etc.). Smith was claiming she would offer a professional service.

Of course I know how this works in practice (sans Title II lawsuit, anyway). But you want to deny Smith a privilege that you want to keep for yourself.

You're clearly not asking for a Title II exemption for yourself on the basis of violation of professional standards. As I mentioned before, Smith's case was similar to ones with close decisions, etc.: it is plain that there is an issue here to resolve, and plenty of lawyers have argued in support of more questionable and less-plausible cases without facing professional censure.

If you're not asking for a professional standards exemption, then you must be asking for a freedom of expression exemption (i.e. that the 1st Amendment trumps Title II in cases like this).