Not sure if you mean why in the movie or why they couldn’t in real-life
in the movie, they bring up the mission requirements at low altitude render a certain tech of the new gen planes useless under the scenario because of its dependence on radar iirc
in real life the decision behind avoiding 5th is because most of the information about the planes are still highly classified, ie there is no full feature spec of 5th gen planes available, so no way united states military would let them film a plane
in the movie, they bring up the mission requirements at low altitude render a certain tech of the new gen planes useless under the scenario because of its dependence on radar iirc
in real life the decision behind avoiding 5th is because most of the information about the planes are still highly classified, ie there is no full feature spec of 5th gen planes available, so no way united states military would let them film a plane