I've said this before in previous discussions regarding Sasha and Tara, but it's even more relevant to this topic:
I think in part it's a "generational thang". Today's young people seem to operate under a principle that one can change careers, and for that matter, even whole identities, every 5 years or so. It's like I'm a figure skater! 5 years later -- I'm a fashion designer!! 5 years later -- I'm running a convent!! And why not? More power to them if they can pull it off. And it's certainly not unusual for former pro baseball players, football players, etc, etc, to go into something entirely different (i.e, selling real estate or used cars, or having executive positions) once their playing days are over. Why should top-ranked figure skaters be any different?
I think regarding Kimmie, Sasha, Emily, Sarah, et al, that this is actually also a testimony to the myriad opportunities available to young women in general these days; Tenley Albright notwithstanding, the opportunities for top ladies of the past, i.e, Peggy Fleming, Carol Heiss, were much more limited. I think Kimmie, Sasha, and Company are more of a product of their generation than of a general trend of just not wanting to be in the skating world all their lives.
As far as opportnities in skating as coaches and choreographers are concerned, I think there is still a market out there. Certainly at the elite level there are more skaters attending the Worlds than ever before, and skating is developing in countries where previously there was none. Perhaps this trend may bottom out in a few years for various reasons, but that may well be a subject for an entirely different thread.