Because some of these idiots (myself included) are interested in chasing the best possible cup of coffee. That requires grinding high quality beans at the time

Because some of these idiots (myself included) are interested in chasing the best possible cup of coffee. That requires grinding high quality beans at the time of brewing. That's just the start though. There are seemingly endless rabbit holes to go down in this pursuit. If you're not into that then yeah, get someone else to grind ahead of time.