Exactly. So you don't need ultrasonic capability to reproduce transients.
Indeed. You seem to be illustrating one of them.
That makes no sense. Do you understand what "resolution" means? Analog signals have a limited resolution too.
Why do you keep confusing between ultrasonics and transients? This forum is not homogenous in terms of knowledge about the subject and many people come here to learn something but absorb wrong information from the loaded statements equating things wrongly.