I know every single one of those references, doesn't mean that there are that many portrayls or references of "Non-Com's | Enlisted".Miles Obrien is a non-com, Sergey Rozhenko was a non-com on the Intrepid, he exclaimed in "Family" "Imagine,an old enlisted man like me raising an officer!"
The JemHadar identified Obrien as "chief petty officer or what starfleet refers to as a "noncom""
In "Valiant" Cadet Collins introduced herself as "Acting chief petty officer"
You're just ignoring it because it doesn't fit your narrative
The shows are pretty much focusing on Officers for everything.
How many times does the show reference "StarFleet Officers" for nearly everything vs how many times do they mention "Non-Commissioned Officer's" or "Enlisted"?
It should be a pretty wide gap between the two.