I am not suggesting this to be your only option for storing your seed phrase. I just thought it could be helpful to remember your seed phrase, in case you lose your backups.
We as humans are created perfect when compared to other creatures on earth. We have reason and with reason we are required to think.
We understand that making as you say is to help remember the 12 word phrase. But we must also understand that when we experience a disaster such as a car accident that causes problems in the brain, are we still able to remember even though we have made it into a song?
It's better to save the phrase in some place offline that we can read.