Well said, Brandon. Writing can be much more than the money you get from Medium for publishing articles.
Every article you put online remains there as both a piece for your portfolio and a means to come back and measure the progress you made since.
Every draft in an author's drawer is a lesson to improve one's writing.
If you just write long enough, with passion, and constantly aiming to outdo yourself, then sooner or later, your revenue will increase.
As long as you feel that writing is the right choice, you should not give up on it on rainy days. For some people, writing just isn't it. And that's okay too.