When your writing is to one real person your examples stop being theoretical and start being real.
Instead of "imagine a situation where someone might feel uncertain," you write "remember last Tuesday when you stared at that email for twenty minutes?"
Everything gets sharper.
You're writing for one, but you've been asking the wrong question.
"Who should read this?" sounds like a business strategy. You're thinking about numbers, not people.
"Who am I writing this for?" is human connection.
When writing for one person what don't you need to explain because they already get it?
When you know what you can skip, you stop over-explaining.
You stop talking down.
You have a real conversation.
That's when your writing connects.
The readers who find you and connect with your work?
They often find you despite your narrow focus, not because of broad appeal.
They see you writing to someone specific and think, "Oh, that's me.
They get it."
The most intimate writing is the most universal.
Not because it's designed to appeal to everyone, but because when you connect deeply with one kind of person, something happens.
A resonance.