Well, the same can be said to "I invented it, it's mine" behavior. A rather convenient rationalization for poor behavior -- in favor of the profit of the inventor (and usually not even that, the patent holder, which can easily be a patent troll or a rent-seeker) -- rather than the society at large or those that can put the invention into practice.
It's as if it's a matter of worldview, rather than some fixed idea that this is good or this is bad. It's also as if their version is closer to the "information wants to be free", "down with patents" etc spirit.
(Not that their companies do it out of altruistic ideology. But for the spirit of the culture at large, that can be said, as it is more communal and less individualistic, e.g. see Confucianism).
Then there's the "We stole foreign IP by the truckloads when we didn't have many inventions of our own to bootstrap ourselves with, but now that we're the ones inventing stuff nobody should do it anymore" rationalization...