Does open-source always have to be political?

I agree with your points. I don't like it either that some people consider that opensource is sort of a "package" by which you have to wear too short a t-shirt, have a beard, express certain political views and only have certain motives for sharing your work with others (and often you see some of them violently disagree on certain political points). While I can have political debates with some people, for me this has nothing to do in contributions and I welcome anyone to participate to the projects I maintain, what matters is the quality of the contributions and the willingness of the contributors to make the effort of doing their best. The rest is totally irrelevant and orthogonal. One nice thing I realized with opensource is that you get contacts with people all around the world with first names that you can't tell whether they're male or female, names that do not reveal any country, skin color, religion, political views or whatever, and it works pretty well. That's exactly why I don't want to know such points from contributors and am not interested in the reasons why they value opensource.

On another point (closer to the main topic), I do use GitHub for the projects I maintain, but only as if it were not the definite choice. This means that GitHub is essentially used as a publication mirror for me. For haproxy we moved there for the issue tracker (which is convenient and mostly hassle-free for reporters), and now we appreciate the CI. But we continue to act as if we were migrating away tomorrow. For example commit messages contain all the details about issues and do not just say "fixes #1234" because this might disappear one day. And conversely I ask contributors to respect the tools and infrastructure we're using for free because we know it does have a value and it helps us, and needs to be respected (e.g. do not abuse resources). We're seeing it as a win-win, we benefit from their platform, they have one well-maintained project with users. But if one day it must end, we'd find something else.