Exactly. An ICBM getting something up there and moving sideways fast is doing the same thing as a launch vehicle getting something up there and moving sideways

Exactly. An ICBM getting something up there and moving sideways fast is doing the same thing as a launch vehicle getting something up there and moving sideways fast. ICBM technology is rocket technology, rocket technology is ICBM technology. The place where they really start to differentiate is the return vehicles. ICBM reentry vehicles have different requirements than other sort of reentry vehicles (basically they should have properties that make them harder to track and shoot down) but even then the physics is all the same physics.