Must confess I haven't yet listened to the programme, but will do so.
If they are really telling young singers to add ornaments in such a regimented way, that's a bit of a shame: getting like competitive bagpiping, where you get marked down if you don't get all of the written ornaments played exactly formulaically and in the right place!
I'm all for there being SOME ornamentation, but everything in moderation, so that it does not become a distraction and/or get in the way of getting the lyrics across.