Whereas the EMS industry has the framework and resources to not only teach their operators about the risk, they can (and have) internally regulated to take the decision making away from the crew regarding "do we go or not"
The EMS operation of which I have some knowledge leaves all the decision making up to the pilot when it comes to the do we go or not. I doubt any other EMS operator is any different. The one thing they do do (at least this particular operator) is follow the rules.
I'd be particularly interested in how the decision making being taken out of the pilots hands works in practise, as you allege takes place. Doesn't happen in this neck of the woods.