that
it doesn't have a specification that has received community review
and consensus before use.
more importantly, what it does NOT tell you is whether it has received
community review and consensus AFTER use.
with certainty, no. with high probability, yes.
what you seem to be wanting is for IETF to bless nonstandard practices
for a widely-used, critical service that is sensitive to disruption -
or at least, for IETF to make such practices appear "equal" to standards.
I think that would counterproductive to IETF's purpose.
nobody should believe that standards are an absolute assurance of
quality, or that protocols that don't enjoy review and feedback are
inherently of poor quality. but on average, you get better quality
if you get community review before settling on a design - particularly
when the design needs to satisfy the needs of a variety of concerns.
Keith