This is untrue. If someone is having chest pains due to any id the innumerates reasons that these rather agenda driven people stare, it would most certain to turn up on standard screening
You have inadvertently tripped on a problem that is being seen more and more with technology. What is clinically significant? We have some tests that are so exquisitely sensitive that we are not sure what they clinically mean.
And so you think microclot as you hypothesize is going to be found on the modalities you suggest? You are working backwards from a conclusion that is not demonstrated trying to prove something that if it exists is likely not clinically relevant.
And the sources as others point out is at best dubious. Someone said someone said is not great theory. But if 30% of pilots were in this condition certain the pilot who responded would be able to provide data in support of the hypothesis. He refutes it. Pilots never fly together multiple times in a row (CRM theory) so certainly our pilot friend would have seen multiple colleagues with this issue. It doesn’t exist. So either he is part of the conspiracy or the statements are not accurate. I don’t think pilots are somehow conspiring to keep data from being discovered.
The statements quoted in the OP are garbage and not supported by easily observable data.
The D-Dimer test has been around for a long time, well over 30 years. The reason the public hasn't heard of it is because it is non-specific, unuseful, and largely eclipsed by actual biomarkers that are SPECIFIC to a disease.
So here is a wonderful case of you thinking this is somehow either kept in secret or a silver bullet, when it is generally entirely non-specific and therefore not useful in the diagnosis of disease. I used it as a marker to determine level of severity of COVID (acute phase) and to help predict mortality, but not to diagnose CoVID.
You have nicely demonstrated the problem of having no expertise, you have no idea what the test is used for, but because some propagandist claims to have talked with a physician who is making bank on being anti-vcxx (who has been thrown off staff at multiple universities including christian universities) for lying about his credentials -- well, gee, you seem to continually point out that you are advance only talking points, irrespective of what the actual truth is. And of course the conga line of acolytes will point out with increasing loudness and insults as they have no response to the truth.