That is a really extremist view and sounds like a cop out to me.
It's very said that your Aunt lost her life aiding someone in need along a roadway, but it's unfair to affect the rest of humanity because of one lost life. Instead of having her life be lost in vein why not use it as an example of unselfishness and use it to raise an awareness within yourself. Use it to be more cautious and perform a better scene assessment to protect yourself in such situations.
I don't know what background your Aunt had but as a Paramedic, EMT, or Firefighter, we have a greater sense to anticipate and assess a scene which can mitigate the tragedy that happened to your family. Your right in that a risk is always present, but I thought it was innate in us to strive to save a life and go the extra mile that an ordinary citizen won't. What would your Aunt want you to do now? Make the effort or be selfish?
Your so worried about putting your family through another tragedy yet your a Paramedic and inherent the risk of that job? IFT or not it carries some risks.
You give one bad example.. but what about the 100 good examples for that one? I think your letting emotion overrule your head.
And it's not foolish to put yourself out there to help in another's time of need. That is called being human and having integrity. Only a fool will turn their back and walk away from a person in need of help.
Well Said