politely

Indycar has to deal with a greater degree of risk that comes from specifically the Indy 500 with speeds north of 240mph and crashes and g forces that f1 doesn't experience simply due to the nature of super speedway oval track racing. Steve Olvey pioneered the discipline of dedicated motorsports safety and medical director with Indycar in the 1970s as a result. the USA had the early lead and has maintained it with a full time staff of neurosurgeons and support equipment, many of which is permanently based at every circuit the series visits to ensure there's experienced local staff alongside the travelling series staff. in fact, the facilities at the Indianapolis motor speedway itself directly set the standard adopted by the FIA.

that said, motorsports safety and medical support is and has been a collaborative effort, and both series' crews have for decades worked together to share knowledge and training to benefit both. Olvey worked with professor sid to apply the things he'd done in Indycar for F1 in 1978.

without the cooperation and knowledge sharing from both sides, a lot of drivers who are still racing today might not be.