If you can't secure a piece of paper with a few words on it, you need to possibly reconsider this hobby.
Can you elaborate on this?
The threat with a seed written on a piece of paper is the physical threat of someone else discovering the piece of paper. You could store it in a safe to prevent most people from stumbling across it. However, if someone breaks into your house and steals your safe, they could likely open it and discover your seed which is in plaintext.