This knowledge of the piano seems to be the problem. Desire to learn it is dying out. As a male, most of my colleagues think it is a predominately female instrument- it lacks appeal to the masculine side of things. And my female colleagues are choosing focuses in violin or flute- with no background in piano. I think learning the piano first is infinitesimally valuable in the pursuit of other instruments.
Parents have a large part in this, I believe. I wasn't given the option of whether I wanted to play or not. I didn't like it at first, but eventually, when given the choice, I took piano because I grew to enjoy it. My mom's friend requires her children to take piano lessons until they move out of her house. If you have qualms about a lack of musicians, breed your own.
Grrrr.... dreaded double post.... my apologies Sionsar...