Because he worked in the gaming industry he has to know how to code? Especially in Python, the language Ren'Py uses?
Well, I work in the printing industry. But I couldn't operate a Heidelberg Speedmaster nor a Fujifilm Jet Press. But guess what, the printer, the man/woman working those machines I mentioned, couldn't do my job either, namely typesetting or imposition.
Who'd a thunk an entire industry could encompass different and highly specialised jobs?!
Thing is, when it comes down to the gaming industry and more specifically small developers, at least in programming, there aren't all that many alternatives - C++/C#, Python and Java are either the biggest ones or the ones most commonly used. While being very much different in syntax, many ideas behind what object-oriented programming entails and how it's applied do not change based on language. Learn one language, learn them all... mostly, and what you haven't learned yet, it's documented somewhere so to make it simple:
Once you grasp the concepts behind the actual act of planning out what a program can do and what it should do for you as a dev, it's only a matter of setting it all up by planning the general structure, maybe making it modular and then putting it into code, regardless of language (to a degree).
EDIT: I just also realized, "gaming industry" entails quite a large spectrum of work - there's also the possibility he was working in the games industry, but not in a field that is specific to programming. More likely it would be that he was a designer or artist, given the spin and unique artwork. So, either direction is valid. So if he has been working, but not as a programmer, your point totally is valid, I merely wanted to point out a flaw in your reasoning in the post you made.