The Wizard is indeed a good starting point for I NTERNAL SEO . But i should stress that it is ONLY i nternal SEO and is not complete. It still will not set canonical tags (though I hear Wix is working on this) nor does it evaluate the wording of the H1, H2, H3 meta tags. Also, it does not help to take advantage of Schema markup.
Lastly, the Wizard does not offer any services for EXTERNAL SEO, nor should it . But external SEO is the real key to marketing.
I think an issue that Wix likely has to face is that as more professional organizations use Wix as a platform, they are going to need to address the highly technical issues involved in the use of websites as tools. Technical issues of which the normal person has no knowledge.