How is this an argument? Canonical makes a distro. They might not have much to contribute to Linux Kernel. That does not make their other open source contributions meaningless.

I'm sure you did not mean to implicate that every open source contribution (such as us application developers) is meaningless unless we also contribute to Linux Kernel.

So if you want to make a point about Canonical's unwillingness to contribute upstream, and using Linux kernel as an example, then you need to show that Canonical has lots of private patches to Linux kernel that they're unwilling to contribute upstream.