Again, please direct me to where I said otherwise.
I have already explained to you that your backstory and whatever life experience you have gained from it is tied and limited to your character level in order to simulate a believable reality.
And others.
Please point me to the point in the PHB where the background description states it is not talking about starting a character at any level
The assumption of the starting section is that the character starts at Level 1. Only later does the game talk about starting at higher levels. No, it does not explicitly state that the piece on choosing a background is only to be used for characters of a particular starting level, but then it doesn't need to. It is pretty obvious that the advice is there for starting players and starting characters, and the default assumption is starting at Level 1.
