That's because the other 7+ billion were not smart enough to compete with him for nearly a year, despite it being made public at the time Satoshi began mining.

That's because the other 7+ billion were not smart enough to compete with him for nearly a year, despite it being made public at the time Satoshi began mining. The "pre" in premine means "before," as in, they mine themselves the coins before they publicly release the knowledge required to begin mining. Satoshi didn't do this. There was no premining of bitcoin.