In principle you are correct in part, but as above, it seems the DSC is "almost" a necessity in some areas!
Rubbish really, as a few days lecture and shoots in no substitute for years of experience.
I have NO official deer qualifications but I am an accepted and hopefully respected deer mentor for Thames Valley and the Met Police.
How daft is it that the Police are happy for me to "train & supervise" deer stalkers but certain organisations will not allow me to shoot on their land because I have no paper qualification!
And if/when you get your own land you cannot shoot what