After reading this forum for a month now (thank you all for the comments and for the great support!), it appears that many asthmatics (myself included) who have a solid diagnosis of asthma, are often told in the AE something along the lines of "your lungs are clear" (after X-rays, listening to the lungs etc). I also now read that people with long covid often hear the same thing ("I can't breathe, but the MD tells me my lungs are clear, what do I do?").
Can airway constriction be detected by X-rays? What is this "clear" statement supposed to mean in the doctor language -- to assure the person that they do not have something more serious than asthma (although the patient came specifically for asthma), that the person is not in an imminent danger of dying from asthma, or is this meant to hint to the patient that it's "all in the head, it's anxiety, its muscle-skeletal" and pack up and leave already ("we need your bed for someone else")? Can one's lungs be "clear" (whatever the sensitivity of X-ray is) while the person is in distress due to tightened airways?
From a layman standpoint, if I think of my lungs as a system of sacks and small pipes, and the bronchi as the main pipes. I.e. the lungs are "clear", but the air cannot get in/out b.c. the pipes are blocked.