Every toy drone will refuse to fly into protected airspace. Theres no reason a car made in the past 10 years should be able to go 50 mph and beyond in a city.
But a toy drone is a toy. It isn't really super impactful if you can't fly it in a protected airspace.
A more meaningful comparison would be with an airplane (small Cessna, big airliner, whatever). Do you think these airplanes should automatically steer away from protected airspaces?
Aviation has solved this problem a long time ago by controlling airspace and having laws that are actually enforced. Your plane may not prevent you from entering restricted airspace, but it may very well be the last thing you do as a pilot.
Besides, modern planes have tons of automation that can take control of it, from simple things like preventing it from stalling to more complicated things like avoiding flights into terrain or automatically landing the aircraft at the nearest airfield.
A more meaningful comparison would be with an airplane (small Cessna, big airliner, whatever). Do you think these airplanes should automatically steer away from protected airspaces?