Flying low works when the other guy is either on the ground or forced to also fly low by your ground based radar. It doesn’t actually do anything against a high altitude radar.
Also there’s a bit of domain knowledge you need: Anything with rotors reflects 500mph doppler shifted radio waves even when stationary, which makes them incredibly visible to any radar that is looking for aircraft.
Flying low works when the other guy is either on the ground or forced to also fly low by your ground based radar. It doesn’t actually do anything against a high altitude radar.
Also there’s a bit of domain knowledge you need: Anything with rotors reflects 500mph doppler shifted radio waves even when stationary, which makes them incredibly visible to any radar that is looking for aircraft.