I agree with some sediments regarding Safety Car intervention. I don't like Safety Cars, but I also don't like unnecessary risks to lives.
If car recovery can be done without personnel being in a dangerous position, and avoiding abnormal vehicles on track lets keep the race moving without the safety car. If a tractor or personnel are a must then they need a safety car for just that: safety.
Sadly, I think IndyCar already has the correct formula for safety cars, and that can be too much for my liking, but in the name of safety I think that is what should be done (within reason)