There's a continuing trend that was first noted in the sixties with the "back to the land" movement, in which very well educated people feel drawn to express themselves by working with their hands.
You can define "educated" any way you want, but the result is that a lot of people with keen artistic sense, well developed observational skills, and the willingness to study intently are dedicating themselves to activities which, a few generations ago, would have been populated by those who had, at best, an apprenticeship.
An apprenticeship is probably the single best way to gain really solid skills, but without the above qualities, it remains just another dirty job.
The other factor is that as women re-entered the workplace post WW2, and families had fewer and fewer children, it was inevitable that family incomes would eventually double, effectively, when after decades of struggle women arrived at top paying positions in great numbers.
Though some of the very top makers are female, they're a tiny minority of the top, say, 20% of people who make knives. So many men are able to take time to develop a craft as a labor of love who, several generations ago, might not have had the option.
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I think too much.
It would be easier to answer the question by saying, "Because we can."
I'm not an example of what Don observed- started making knives in about 2008 and I'm STILL struggling to make JUST ONE J.S. quality knife. O well.