... Let's go back to now, I don't remember that I made a password in the first place, but when I run the wallet it asks me for the password.
When exactly is it asking for a password? 
If he's a "Bitcoin = Bitcoin Core" coin name old propaganda victim, he must be talking about a different wallet.
If not, it's a made up story.
@Jan Drapper "Bitcoin Core" is a name of the reference client not the coin, if you're talking about a "Bitcoin" in general, call it "Bitcoin" not Bitcoin Core.