I moved to weighing the benefits of proving someone wrong vs. ignoring and nodding. Will help to reduce the number of arguments you get into and make room for the important ones.
I realised a while ago that I was spending way too much time and energy getting into pointless online arguments about social justice issues. I now have a pretty low threshold of disagreement above which I'll immediately (and politely) disengage, and if it escalates at all from there, just block the person. I no longer care if someone is wrong on the internet, it's not my job to re-educate them, and the less energy I waste on them the better.