In article , Janet Baraclough
wrote:

Why should garden programmes have to endure
presenters whose experience/expertise is so inferior to the average
sports presenter?

I don't think that's true. Most sports presenters know about as much as
the typical viewer who reads the sports pages. And anyway, many sports
presenters are also picked for their looks and voice. Try watching Sky
Sports News where most of the presenters are dolly birds who know very
little of what they speak.

Whether it's gardening, sport or anything else, it boils down to this:
it doesn't matter how much the presenter knows if he can't get his
message across.