Why is only 127.0.0.1 (out of 127.0.0.0/8) a node_lo_t in policy?

I was trying to understand selinux better and was looking through the
policy sources and noticed that out of the loopback address space only
127.0.0.1 was given a local node type with the following:
nodecon 127.0.0.1 255.255.255.255 system_u:object_r:node_lo_t

I would have expected a netmask of 255.0.0.0 in the above.

Is this a trade off of mistakes when people use a nonstandard network
mask for loopback versus potentially having to modify the policy when
running services on loopback addresses other than 127.0.0.1? (Which one
might want to do to reuse a standard port number when providing local
services.)

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