I've spent way too much energy on this insane argument, but I can't let this last sentence go unanswered. Calling the implementation of visible play clocks and the :40 a nuclear bomb is asinine..
I didn't suggest that play clocks were nuclear bombs, rather that "overkill", and/or over presumption, can be problematic, YOU made that direct equation.
Play clocks are not "the Devil", but they just as likely are not the ULTIMATE, EXCLUSIVE, ONLY PRACTICAL answer to the question of improved "play time" management. For 50+ years there have been issues with consistently providing competent "GAME Clock" operators. Many areas have chosen to deal with those issues by providing assigned certified officials as Timers, other areas by increased training and/or certification of non-official Timers.
As I understand, both NCAA and NFL games utilize separate (trained and/or certified) Game and Play clock operators. Some (NFHS) schools prefer using a single operator to mange BOTH functions (personal opinion: "An accident waiting to happen").
Serious consideration weighing; ACTUALLY how big a problem (@ NFHS level), how significant the improvement provided, the cost of implementation & ongoing necessary operation including competent manpower, the value of the benefit provided, the comparable cost of other available remedies & possible solutions are viable alternatives worth considering BEFORE adapting the MOST expensive, PERMANENT solution.