I’m pointing out that the legality of overflying a country has always been and still is a lesser concern. Mission profiles better suited to a plane than a sate

I’m pointing out that the legality of overflying a country has always been and still is a lesser concern. Mission profiles better suited to a plane than a satellite: anything that requires loitering, returning to a target, anything that requires a curved path that a satellite cannot fly or anything that requires close up - optics on satellites are good, but fundamental physics limits the achievable resolution. Hypersonic speed might not be required to fulfill the actual mission, but it allows shorter response times on all spots. It also would allow evading most intercept attempts.