Hey Didier
It's an interesting interview. I agree with with what he says when it comes to songwriting, but he's a bit harsh when it comes to Britney. I guess Britney is a performer who happens to write songs, as opposed to Crosby who is a songwriter and musician who performs. For Britney its a package where music is part of it, a bit like modern musichall . She and her like are accomplished artists, it's just that areas other than Music are as important if not more so. They're just as valid. Music has always had performers. Similar things have been said in every decade about the pop Music of the time. It might be a chronic condition just now, but there's always an undercurrent of good Music in the alternative scenes.
More and more of the music biz is shifting away from songwriters, and purist music, but I reckon it'll come back around again, where the emphasis is placed back on the quality of the songs and what the songs say. As usual though it's up to the artists. At several points indie artists have revitalised the Music industry, and it will happen again.
I saw Crosby, Stills and Nash a number of years ago and Dave Crosbys' voice was amazing.
Cheers
John