Who's "we", though? Here's the list of Linux Foundation members: https://www.linuxfoundation.org/about/members It's a foundation by, and for, commercial interests; not the users. If the same interests made up a foundation to develop a browser, it wouldn't be different from Chrome; because in the realm where browsers are supposed to work, those 'commercial interests' would demand doing what Chrome does.

It's a 'happy accident' that with respect to a unix-like OS kernel, the interests of the industry ended up being compatible with the interests of the user.