To teach an EMT a skill that they may or may not use or use very rarely and with no monitoring for competency, might be a little futile.
As non-confrontational as I can type this: Can I infer from this that you also believe EMT's should not be taught the Heimlich Maneuver? The Jaw Thrust? Tourniquets? Traction Splints? APGAR scores? The Rule Of Nines? ...
Essentially what this whole thing comes down to is a UNIVERSAL lack of legitimate CON-ED and for that matter ED in EMS. It absolutely amazes me. This topic in particular, airway management, should be beaten like a dead horse. Airway opening and positioning, BLS ajuncts (OPA's and NPA's), suctioning with the different catheters.... You can't get to the Breathing part of your patient until the Airway has been managed.
Getting back to the topic at hand, should non-emergent, non-vented trach transports go BLS? Yes. Are we as a profession there yet? Not even close.