Most machines don't have modular, swappable systems. For example you can't generally take the wheels of one model of car and just bolt them onto another (even i

Most machines don't have modular, swappable systems. For example you can't generally take the wheels of one model of car and just bolt them onto another (even if the bolt holes and centering ring line up) expecting it to go well. A tailhook is undeniably more complex than a car wheel--it's not a reasonable expectation to be able to just bolt one on from a different aircraft.