It’s not really hard to explain: the probability of two people generating the same random 256 bit number is roughly equal to buying four tickets to the national

It’s not really hard to explain: the probability of two people generating the same random 256 bit number is roughly equal to buying four tickets to the national lottery four weeks in a row, and winning the jackpot on all four of them. No one has ever won the jackpot even two times in a row, so do we really need to worry about someone doing it four times in a row? (Two people generating the same 256 bit number is a collision, which means the probability is 1/sqrt(2^256))