Beyonce didn't get where she is today by recording rotten songs

Chris Martin tried to write for Beyonce, but Beyonce turned her nose up:

Well, I did write a song for Beyonce, but it got rejected by her A&R people. And the one I wrote for Rihanna didn't get rejected.

Apparently there are, like, barriers, man:

"It was when [Rihanna] was doing 'Rated R', but it took so long – there's still this tribalism in music where we're rock and you're hip hop, and sometimes it takes a while to get across those barriers."

I think you're confusing "barriers" with "quality thresholds", Chris.