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.
Steam also don't engage in anti-competitive behavior and prevent billions of people from using alternative game distribution methods like Apple does.
What we need is real competition in the mobile app distribution market to determine whether or not that 30% is actually fair, efficient and competitive. As it stands, there is no competition in mobile app distribution.
GOG has much better policies.
For example, GOG sells some games that try to phone home. Many of these were games/franchises that did business with GOG, then were bought.
Take a look at the reviews for Kerbal Space Program, or Stellaris for some of the shenanigans that happened after a game was released.
But because their stance is no-drm and you can play all their games offline, you can block them and the game will still run.
There is no such stance with steam.