I am using it here experimentally, with a line of thinking similar to yours.

What does this mean? Are the keys generated in a completely different way compared to other scripts?
Not necessarily in a completely different way. The goal here is to guess private keys that are already in use. The rule is that there are no rules about what you should use as a random generator. You can use a lottery drum if that method is fast enough for your needs. I have even used UUID Version 4 in some key generation scripts. This is fine as long as the keys are not used for real funds or transactions.