Earlier quoted context omitted.
I understand that, but while the FSF might criticize liberal licenses, both GNU and many other GPL projects use code under those licenses, while their code is closed to the original projects. That's what bothers me.
And by choosing liberal licenses, those original projects have indicated that they're fine with that. Seriously, I don't see the problem. If you don't want people to use your code without making their changes available to you, license it under the GPL. That's what the GPL is for. Criticizing GPL projects for the fact that some projects are not GPL seems an odd way to spend your outrage budget.
And I don't agree that choosing a license means the authors are necessarily fine with their code being used in such a way - it might just mean they don't believe in using (copyright) law to enforce it.
And even if they are fine with my activity, that still doesn't mean I must be OK doing it. As an analogy, I wouldn't sell tobacco, despite the buyers actually wanting to buy it.