If you are not rythming, then it's not a song. That's what a song is, puting rythming words to music while promoting a theme. Otherwise, you are merely jotting down a bunch of personal thoughts. A diary! Since you are not interested in selling a song, then it's a diary that you don't want anyone to read. You are writing for yourself.
That's fine, but don't try to all it a song. It's not. Furthermore, I find that people who criticize without conforming to the basic structure of songwriting actually feel they can't. They feel they can't tell their story in rythme with a beat, so they don't try and criticzes those who do.
Anyone can write in rythme. For some it's more difficult, but the more you do the easier it becomes. Try it! Don't knock it!
This is not to discourage, but to encourage!