My view is that power saving is useful on all computers, not just laptops. Also, some might view disabling WoL by default as a good thing (e.g. more secure).
There’s a TLP setting in /etc/tlp.conf to leave WoL alone:
# Disable wake on LAN: Y/N.
# Default: Y
#WOL_DISABLE=Y
Distros distribute the software they think is worth distributing. Defaults are down to the maintainers. 