This fellow has obviously no clue about Python and likely not much about programming in general when he can spout such nonsense about Python being "C-based" and "unable to do more complex things".
I read this more as - "I know Visual Basic so I will do everything in VB to save time". If he has said that, he could have avoided presenting himself as an ignoramus spouting techy mumbo-jumbo to get that parent off his back that doesn't really know much about the subject he is supposed to be teaching. I had colleagues who were teaching object oriented programming at a university using Max/MSP and dragging/connecting boxes - "These are objects in Max, so it is an object oriented programming!". But that is what you get when you have a music composer assigned to teach computer science (not kidding ...).
I am really sorry for those kids, because Visual Basic is a pretty terrible language to start from - it is very limited in what it can do and then anything more complex is directly linked to the Microsoft Windows idiosyncrasies, with little abstraction. They would have been much better off with something like Python & Pygame combination (I did teach a first semester programming class like that). Or even better some language actually specifically made for this purpose - like Logo. Or even start with Scratch, Alice or Lego Mindstorms kits for complete novices that have really no clue yet and then move on to Logo or Python once the basic concepts are settled.
People that are advocating C here have obviously never tried to actually teach it to complete novices (we are talking high school kids here!) - there you need to get the kids to first understand the abstractions like code, execution flow, the correspondence between real world objects and their modelling in a computer (variables, types, use of arithmetic etc.) Having to battle compiler errors, strict typing and stuff like pointers required even for printing a simple "Hello world!" message is really distracting and not helpful in that context. They will have plenty of time to learn about that later.
Disclaimer: I did teach undergraduate programming courses, both in Python and C/C++, including using those Lego Mindstorms kits.