ipv6 firewall in help.mikrotik.com

Hi,

I’m a not a big ipv6 expert.

I have a question about https://help.mikrotik.com/docs/display/ROS/Building+Your+First+Firewall
Specially for:

/ipv6 firewall address-list
add address=fe80::/16 list=allowed
add address=xxxx::/48 list=allowed
add address=ff02::/16 comment=multicast list=allowed

My question is:
Why link-local networks is set to fe80::/16 is there any reason to not be fe80::/10, same question and for multicast ff02::/16, why is not ff00::/8 ??

Regards,