When you really get engaged in a scientific theory, just as when you support a particular political viewpoint, it can be very difficult to let go. This might run counter to the theoretical nature of science, which supposedly delights in overturning old theories - but the reality is that scientists are human beings and don't like to change deeply held views. This need to sometimes push through a major change of viewpoint is behind Kuhn's concept of a paradigm shift - for a considerable time the old guard cling onto their theory until it become untenable and suddenly the consensus undergoes a heavy duty shift, which can be distressing to those left behind. It happened to me, not as a scientist but as a young science enthusiast, when my passionate support for Fred Hoyle and the steady state theory had to be swept aside for the Big Bang theory. Now, it's entirely possible that something similar is happening to upset the equilibrium of supporters of the existence of dark matter
Despite all its faults, as a science writer I have found social media wonderful - it allows me to tap into both the science and writing communities, which is excellent for someone working in a job where you don't have much opportunity to meet others in your line of work. I've been involved in this kind of thing for a while, beginning with an ancient forum (I can't remember where it was hosted) set up by the Society of Authors. I'm still in contact with quite a few writers from this, who can share a wry smile when remembering the lack of foresight from whoever set it up, that a forum titled Writers' Exchange might look a little misleading when the words are run together without an apostrophe. Until recently, by far the most useful social media site for me was Twitter. It probably still is, but X is declining in value because a number of my long-standing contacts have abandoned it out of dislike for its owner. Personally, I think this amounts to cutting off your nose