I have more than 60 Bitcoins in an account since 2014. At the time I was using Bitcoin Armory to manage wallet. After some health problem I have lost the private key but I still have the password. There is any way to recovery my Bitcoin?

As I understand after extensive search it seems to be hard to find the private key of my own BTC address but i fund an interesting site called https://privatekeys.directory/ where seems to be possible to find (theoretically) any private key.

It's really so simple (if someone is lucky) to find the private key of an account ?? If so.. there is no way to protect the account with a password?