There are so many interesting things to explore. Content is not the problem and quality can be developed.
Many may be unwilling to put their thoughts and work up for review or spend 'too much' investment without a guaranteed return.
As you said, they should write more for themselves anyway. Also care less what others think and take the reward of self-exploration as a value that no one else can provide.
here;s an auto-return investment: the more you write, the better you are at it:)
Exactly, every single person has their own niche. Very few realise the potential of this fact.
I even surprise myself with my output sometimes.