I don't really care for the reason, why can't we as consumers opt out if it's consumer oriented then? For me it's not even about the egregious security and privacy implications -- I just simply want the (illusion of) choice w/r/t silicon rootkit 'features' that I'll never use.
You can, it even says in the article that Lenovo and Dell are shipping with the Pluton chips disabled by default. If they can do it, a user can disable it to (for now at least).