Probably designed by the same person who designed the crontab app then, with the command line options -e to edit and -r to remove immediately without confirmation. Misstype at your peril...
Using crontab -e is asking for trouble even without mistypes. I've see too many corrupted or truncated crontabs after someone has edited them with crontab -e. crontab -l > crontab.txt;vi crontab.txt;crontab crontab.txt is much better way.
You mean not everyone has crontab entry that backs up crontab at least daily?