Why is it disingenuous? And what is incorrect? According to the show, Apple provided around 20,000 lines of coding; that's it. You do know this toolkit was open source Crossover -- you can
download it yourself for free and do exactly what Apple did. They also say they tried a bunch of games, and performance was middling at best. So "did very little" appears accurate.
And, look at this:
Proton itself is by
Valve, not Apple, precisely because Valve earns 30% of every purchased port. I think the Linus evaluation was pretty spot on.
People "playing" Windows games doesn't mean the performance is good, in fact they reported performance is poor across a range of titles.