I go to Facebook to learn about baking with Sourdough starter, growing Chili peppers and to see what’s for sale in my area. Nobody in groups like that cares about politics.
My occasional Facebook views are similar to yours however there is a VERY public and vicious political side to Facebook.
Your groups are just very small and not politically related.
Why do you think that conservative groups and individuals are always being removed, censored, or bumped off the platform? Heck, Congress is having hearings regarding it....