syslogd(8) and chroot

[Sad Clouds <cryintothebluesky%gmail.com@localhost>]

Hi, does anyone know why NetBSD syslogd implicitly calls chroot, when it
was not requested to do so via -t option?

$ syslogd 
syslogd: Failed to chroot to `/': Operation not permitted
syslogd: Fatal error, exiting

This prevents syslogd from running as unprivileged user in chroot jail.
Is there any security benefit of calling chroot on / directory?

I know syslogd can give up root permissions, etc, but I'm playing
around with chroot partitions to simulate zones/jails and trying to see
how many daemons can be used as unprivileged user.