Many points were raised, but I believe that key term for what people do when preparing fo buying decison is they prepare "overview" of situation. Price spectrum, sizes, wanted/liked/unlocked ingredients any parameters.

You can't make proper overview without actually browsing menu of one or two providers. AI at best can sloppify you with wall of text or table that you actually don't want to read, because menus and UI are actually better design than random markdown output.

Then AIncsn have tool to output good summary of menu, but people will not trust that this choice was in their interest rather than minmaxing algo of whoever controls agent.