Even just from a financial point of view (although I appreciate some people seem to have more money than sense...)
When I started out shotgun shooting, I was looking for a Browning 525. Came across one on GunTrader being advertised by a guy who had bought it new, took it to a clay ground for a taster lesson, and called it quits after 25 cartridges...
Fail to see how it would be a problem just to say, okay if you want to get a licence, you need to provide a contact for either someone who's taken you out to shoot and can vouch for you (experience) or the local clay ground where you've had, say, 2 or 3 lessons.