Write for you.
Write because you are passionate about it.
Write because it intrigues you, because it must be written, because you love it.
Write because you want to.
If you're not writing because you love it, because you're passionate about it, then why write?
Why write if you don't love it?
Why write if it doesn't burn within you?
Why write if not for you?
You will not find a good essay if the person writing it did not want to write it. It will be subpar, and bland, and lesser.
You will find a good essay if the person felt compelled, if they were passionate, if they wanted to.
Why write, if not for yourself?