In drones the genera rule of better ask forgiveness than permission applies. Think of it as just doing photos with a hand held camera, you'd only ask permission to take portraits, but not to do landscapes, which is basically what you do with the drone.
Whenever you ask permission on anything drone related you'll always find a person that will say "no", and in general it doesn't matter what they say because no one has a clue of the rules except the specific drone police patrols (which exist in Spain, for example) and the pilots that invested their time reading the rules.
You must know all the rules that apply for any specific flight perfectly (specially when travelling to other countries), else you won't be able to successfully hit&run.
Know the rules, don't make you an easy target, don't ask for unnecessary permission, takeoff from remote areas and fly wherever you want with a hacked
Mavic 3 (no RID/Aeroscope), and if you are caught don't confront, don't argue, don't try to be a macho, just play the dumb a bit, and bye bye to fly another day.
The alternative is just leaving the drone in the bag/shelf forever, sell it second hand or limit yourself to fly it VLOS, like an RC plane, on a designated area.