You do explain the ideal, but individual mileage may vary.
See for example John Darsee, Hwang Woo-Suk; and of course for waters muddied for a long time see David Baltimore.
For other sniping read Gary Taubes' Nobel Dreams about Carlo Rubbia...
Cheers!
Oh, I agree, the process isn't perfect, but it's far better than the alternatives!
The way the system is set up, the 'bull' tends to iron itself out over time - the only question is how much time....