mentsch1 that is a risky approach
with any screening exam you need to weigh the risk and benefit.
CT’s pose risk of radiation, finding benign abnormalities that result in extensive workup (and of course const $$)
Thus for the general public a routine screening CT for lung cancer is not reccomended. however those at higehr risk namely aged 55-80 wit hsignificant smoking history the Benefit > risk based on current evidence.
There is no evidence that “new full body screening exams” provide benefit. that is the reason to avoid them.
Taking your approach not to do any screening unless they are to “people with risk factors for medical issues” is dangerous. All adults should be screened for Colon Ca at the latest age 50. Unless you include ” risk factor” as age (which it is)
though in that case your quote from a Very chashuv posek becomes “dont do screening exams unless recomended by medical evidence” which I agree with, though Im not sure why it needs a “very chashuv person/posek” ‘s backing.