Everyone is running processes, so it's not like were trying to stop you run things
The more frequently processes you run, obviously the higher your VPS load will be, but the main issue with the common 1 and 5 minute crons is that the time is synchronized on all VPS and so it means at the exact same instant, all VPS attempt to do the exact same task which can spike the load on the server, especially if the taks is resource intensive. So my only point was if you need something run every 5 minutes, it is not necessary to run it on 5,10,15 - you could run it on 1,6,11,16 for example. We actually do stagger the common ones like BFD to avoid this.
It would nice if you could choose the second to start cron jobs on imo. Even staggering jobs by 5 seconds can make a big difference
charles