Personal is “me” ... and not “me and ten other people” ... :-) ...
Salvation is EXCLUSIVELY PERSONAL. It’s not you and your spouse, not you and your parents, not you and your kids, not you and your friends, but it’s YOU ALONE with Jesus, the Messiah of Israel, your personal Savior. That’s it ...
There are no instances of "personal" in the scriptures but your comments are reflective of theology in the modern world, it being wholly personal in nature.