Propagation? Absolutely but not fussy house plants in such quantities perhaps.
Class envy? No. Like i said, I have a large garden and a paddock but no orchard. If you took an aerial photo of the major population centres of TV land and their gardens it would be Victorian, Edwardian, 30s, post war and recent housing developments with ever decreasing garden sizes plus rents or mortgages, not to mention energy bills and living costs, that leave little left for buying fancy garden equipment.
I am fortunate in having plants to propagate and swap with fellow gardening enthusiasts and the skills and experience to do it successfully but I do have friends who are novice gardeners for whom most of last night's show would have been completely irrelevant or beyond their means..
GW should be practical and inspirational and can do so that more people feel both able as well as inspired to have a go and discover the joys of growing plants. Delia may have had an army of helpers and tesres but her recipes work and are easy to do in a normal kitchen. Monty also has help but it's never seen or mentioned.