> There are some people that believe that writing is an act of creative expression.

I think "some people" might be underselling it, as evidenced by the borderline innumerable fiction books in existence?

> and as such, it's a quite selfish activity

"quite" seems a bit harsh, surely "writing because you enjoy it" is pretty far down the list of all "selfish" activities? I'd imagine many authors also write because they think others will enjoy their works.