Yeah - there is
no such thing as "zero risk."
For a more realistic example: should we require fire suppression sprinkler systems in single-family homes? This is recommended per current IRC code and specified in NFPA 13D, but practically every jurisdiction nationally has opted
not to adopt it as a requirement (with some exceptions that
have adopted it and made such systems required). Massachusetts state building code only requires fire suppression sprinkler systems in unattached single-family homes if they're over 14,400 sf.
The
vast majority of buildings one can "walk into" today do not meet current code. Current code applies only to new builds (or new substantial renovations), and not to buildings built or substantially renovated prior to current code being implemented. And even there, code is open to interpretation and inspectors have the ability to (often!) say "close enough" when meeting code to the letter is not easy or feasible.
Unless you live, work, and vacation exclusively in new builds, chances are that there are code violations all over all the buildings you enter. But this is a "risk" we accept because it would be prohibitively expensive (like -- we as a society could not potentially bear the costs without completely reshaping our economy) to fully retrofit every existing building to current code every time code changes. Are you proposing that we do that?
There are
plenty of examples of building code being set using arbitrary standards that are not scientific or rigorously designed and often even counter-productive to safety overall. For example, if we make it crazy expensive to install elevators that meet current code (
we do) than many buildings are just built without them (they are). But elevators (even those that don't conform to current code) are on net
safer than stairs in many situations, so code's quest for the perfect ends up falling short of the good. Similar dynamics apply at times to double-loaded corridor dual egress buildings compared to much smaller floorplate single-stair buildings, etc.