But I do read tech related news on a daily basis. So if a story is related to gaming or software engineering I probably would have heard about it, but if it's related to the goings on in Westminster or the White House? Not so much.
As for how I choose sources? Well usually it's based on me having found said source reliable in the past, and trusting them afterwards. If they then start posting falsehoods, I'll drop them and find someone else to get info from instead. I usually use a variety of sources for this, all of which I've had experience with for years or decades.