That's how you use FB. I avoid arguments there (though inevitably I get into one once in a while) but it's a hugely important social outlet for me. I've got a lot of wholly virtual relationships that go back years, and trying to organize them into other channels would be a major headache. I know quite a few of my other friends on other platforms/forums, but the very generality of FB (vs the extreme siloing of most websites) is an asset despite its many flaws.