That’s how plans usually form, from what I understand.
He didn’t have to know, and he himself knew of the alternatives for people who don’t “know how to gamble”. Nobody in any country can stop you from using your own money in an unwise manner.
When they say such things, the are probably talking about the expected value, where those chances are taken into account, just like the number calculated in this article.
You are remembering that the executable features of autorun.inf is disabled, which is still true. Autoplay (if enabled) as it exists currently only applies for discovered media file types and makes your default configured media player responsible for handling them. It would not be possible to execute arbitrary tasks unless you had an ACE exploit for the installed media player.
But, the whole point is to have the waters muddied. That’s why it’s called a dog whistle, because only the dogs (the intended audience) will hear the whistle (recognize the true intent behind the phrase).
This age period is shockingly young; I don’t remember exactly but iirc it’s less than one year old.
Anecdotally, that sounds hard to believe to me, because I moved from South Korea (which has the same sound ambiguity) to the US at the age of 11 and have no problem at all distinguishing between the two sounds. All of my Korean friends that I had back in middle school also had no issues, even though none of them were born in the US. On the contrary, I’ve been told at times that I speak Korean with an obvious western accent.
I wouldn’t be so confident about assigning such motivation.