You lack theory of mind, people may "experience" regexes in practice but not make the careful distinction/connection to the elementary theory (and theorems, e.g

You lack theory of mind, people may "experience" regexes in practice but not make the careful distinction/connection to the elementary theory (and theorems, e.g. about the limitations of regular expressions) taught in CS majors at university, this is not some unusual disconnect, but happens often and in many disciplines whenever transferring any knowledge from academia to industry.