"This is 100% compatible because we use the CPython runtime without modification for full compatibility with existing Python libraries."
At this point you need to either explain your objection, or just admit you are a troll. You haven't actually at any point in this exchange offered any actual argument beyond 'duh, you're wrong'. I'd be ok if you actually pointed to something like 'well technically, the mojo parts are compiled differently', or something. You say you worked there, but you're not even looking at their website.
Creator Chris Lattner discussing why they used Python. https://www.youtube.com/watch?v=JRcXUuQYR90
Start at minute 12. "Mojo is a very extended version of Python".