As a writer you want to convey your ideas, thoughts or realizations. Some just like to share, some would like to make life easier, by analysis and understanding more deeply; some need an outlet for their pain.
What it also means, is this:
Sharing thoughts, ideas, movies or results of research does not mirror one’s own experience 1:1 in every single case.
Humans are capable of a wonderful gift: Empathy.
That is what sharing can be about:
Empathising, because you feel or hear the others’ pain. And for those that feel pain the fact that someone actually understands can be a wonderful relief.
In literary research and in literature, it is one of the first rules: never assume that author and narrator are one and the same. The same is true for other kinds of texts, whichever they are.
A number of my readers may know this well anyway and take it for granted. Still, I’d like to point this out for all who might not know or be aware of this.
When I write here, about philosophical ideas or life, politics or love – you name it – most of what I write about, as all writers of any genre do and know too, originates in thoughts, very extensive reading throughout a lifetime (in my case), research, online and offline – and observation.
Writing about it does not necessarily mean that someone has seen or done something themselves.
To believe that would be gross, in some cases, but presumptuous at least.