Stars doesn't equate to good TV.
Good direction, innovation, writing, set design, journalism and research does that. And that doesn't have to cost millions.
The people who front these programs are so much less important that people give them credit for, and in most case are completely expendable and interchangeable.
The BBC shouldn't be about big stars and personalities. It should be different from commercial TV. It should take risks, make programmes and cater for people that other broadcasters don't.