I have to disagree that most decisions at the Beeb are made by men.
There have been a lot of women at the top at the BBC - senior managers like Jana Bennett, Jay Hunt, Lorraine Heggessey and Janice Hadlow.
Jay Hunt was instrumental in the removal of the four women from Countryfile.
The problem is more that TV channel heads and producers (male or female) have been able to make snap arbitrary and highly subjective decisions on presenters.
Miriam's case will change that quite radically, I think, and TV managers will have to demonstrate much fairer and open selection processes.