Randy, my knuckles don't scrape the ground when I walk, and I still have all my teeth.
Tell me, right now, from your car garaged in Alameda, how you can plan a trip to a distant location from your center display and take in all the possibilities and personal detours and roads less traveled? I have yet to figure this out. Hence, I use PlugShare as a companion to EVTripplanner. If Superchargers are listed only as a courtesy for completeness as you say, then it is a tool with questionable veracity. Their Q-and-A section is silent as to its commitment to accuracy, only stating, "...provides the most accurate and complete public charging map worldwide, with stations from every major network in North America and Europe." Their use of the superlative implies that competing maps are inferior, which is a very low bar today.
Indeed, if what you say is correct, then PlugShare needs to disclose this information clearly to all its users. PlugShare needs to explain what they do, how they do it, and then have a very clear and concise disclaimer that is not buried in the 150,000-word legalese end-user agreement or somewhere else. Maybe this is self-evident to you. But it is not self-evident to everyone.