I still can't listen to 1120 (KMOX), 840 (WHAS), et.al. because the
HASH is so intrusive.

Where are you trying to listen to them? Someone living in Australia can't
hear them either.

Don't the decision makers realize they are
driving away listeners in droves?

There is no evidence to suggest that they are "drivi9ng listeners away in
droves". Most (if not all) listeners do not notice any difference.