[neodymiumphish]

OK, no, it's not intrinsically or uniquely western. Any person who has an idea has no obligation to share their ideas, that's universal. This revolves around the expectation set at the point of sharing their ideas, under which they say, effectively, "Here's something I came up with. I'm sharing it with you in exchange for your agreement that you will attribute it to me and not take the idea and publish it as your own." The ownership and control under closed source could (somehow) be argued in the way you're suggesting, but for open source it's a matter of blatant disrespect and refusal to adhere to and of the requirements set by the initial sharers of their ideas.