I understand all that, but using metric as a numeric language when communicating to the broad American public is guaranteed to inflict blanks of non-comprehension on most recipients.
I honestly appreciate it when I'm watching a science program and a scientist takes the care to speak to his American audience in units of measure they instantly recognize. Being somewhat of a junkie for that sort of programming, I know that he's consciously going the distance to achieve simple understanding on the part of his viewers.
The ubiquitous usage of metric units of measure in the common dialog is a pet peeve of mine. For me, it's just another invalidation and rejection of my American culture by the same forces that don't like my language or my heritage on this continent.
They're forcing me to be illiterate and innumerate in my own country.
Aw, I hear you yet do not agree that you're illiterate because undoubtedly you have a career lingo of your own which outside others don't understand. Each field seems to have its own lingo.
Generally speaking some scientists have a difficult time putting concepts which are simple for them to understand into everyday language that anyone outside of their community will also understand. After they've sunk their time, energy and money for 4 years college, then 4+ years grad school education; and then written research papers to be read and appreciated (or not) by their peers, it's easy to understand how difficult it might be for some of them to remember how to communicate with anyone outside of their specialty.