I think that is an extremely bad idea al around.
People call for help, because they need help. They may not need a paramedic, or a firefighter, or a police officer, but for time immemorial these public servants have always helped.
It is only within the past 15 or so years that they started seeing themselves more as role specific than servants of those in need.
We watch every day people who are afraid to help others because they worry about messing up or making things worse. How do Fire, EMS, Police professionals suddenly decide who is worthy or not of their help?
Calling for help is one of the hardest things people do. Discouraging a call for help is about the most inhumane thing I can think of.
Ads like these do not affect the frequent flyers, because they have nobody else to call.
They do affect the people who usually put others above themselves. (Like many in the older generation, military vets, etc.)
From a medical standpoint we know many life threatening conditions are insideous. MI, Stroke, and Aneurysm, are also time dependant.
You cannot say on one hand "if you think you are having a heart attack or stroke call early and call often", and on the other tell people not to call unless it is critical, serious, or whatever.
People who come up with this crap have no business in public safety or medicine.
They should be relegated to a job where the only people who can be hurt by their hubris, ignorance, lack of empathy, and self importance, are themselves.
F****** morons.