This is a beautiful quote because it is an example of one industry's bad behavior leading to another industry's bad behavior, upon which the first industry then users the second's similarity to justify themselves. Cars only started doing this because phones made it normal. It's wrong in both cases.
It's similar to when Apple defended it's 30% store cut by claiming it's an "industry standard"... specifically, an industry standard that Apple established.
A sibling comment notes that Steam charged 30% at the time (though some had better deals) but it's worth noting that Steam was not an open platform that anyone could publish on. Much like for consoles, to put a game on Steam you had to have a preexisting relationship with Valve, or try to develop one with no certainty of success. This was also considered a very generous cut because getting on Steam was almost a guarantee of financial success.
The fact that there was this wide open field, where, sure, maybe you paid Microsoft for the OS, but then the rest was up to you. Trade shareware CDs, install stuff from the internet, type in code from a book or whatever, it felt like an infinite open field of possibilities.
I guess it's normal that the exciting frontier shifts around, but I really can't believe that it's somehow a good thing in this case.