Your saying that because EVERYTHING that Jesus said or did is not written down, therefore the Catholic church can make up traditions at will and accredit them to Christ?
All John 21:25 says is that not everything Jesus said or did isn't written. Thats ALL it says, no more no less.
That’s correct...that’s all it says...unfortunately that’s used to often to justify additional books, teachings and literature....and at worst to say things Christ never said.