I buy unfinished games sometimes. I buy unfinished businesses. All investments in businesses are purchases into what a company has yet to offer or complete. If you want a finished product, them go find a finished product. No one said you have to pay for primal. You can pick something else.
Are you upset that some people like it? It bothers me that people overrate Taylor Swift but not to the point that I feel compelled to call her a grifter. The people who pay her money for her unfinished songs actually like what they're getting.