I love Fleetwood Mac but...

I love Fleetwood Mac. Love 'em. It shocks me to realize I am one of the few but to each their own, and that's not the point here.
The point is that I love Fleetwood Mac. Love 'em. But for God's sake, why did they ever let Christine McVie sing? Especially when they had a singer like Stevie Nicks? She has such a beautiful voice -all low and full and lovely, so full of personality and the ability to carry a tune- I have no idea who in that band first stepped forward and said "Hey I've got an idea! Let's let Stevie be strictly tambourine for this one and we'll get Chrstine behind the mic!" (but I'm laying money on the bassist)
She sounds sort of like Nico...only the bad part of sounding like Nico that no one ever really mentions cause she was down with the Velvet Underground and if they dug her why shouldn't we, you know? Not in the "it-just-don't-matter-if-she-sounds-a-little-wonky-and-tuneless-cause-it-
works-and-she's-motherfucking-NICO-by-the-by-and-Andy-Warhol-was-
fascinated-by-her" kind of way.
In more the "she-plays-keys-and-even-though-that-takes-way-more-
talent-than-any-tambourine-Stevie's-ever-played-it-still-kind-of-feels-like
-there's-a-bit-of-a-Jan-and-Marsha-thing-between-them-cause-A)-Stevie-
can-sing-a-song-and-B)-she's-the-chick-all-the-guys-want-to-get-with-not
-Christine-and-C)-it-doesn't matter-who-was-there-first-people-will-always
-think-of-Stevie-when-they-think-of-Fleetwood-Mac-partly-because-D)-
hers-and-Buckingham's-break-up-spawned-one-of-the-best-records-ever
-where's-your-blood-sweat-and-tears-on-Rumours-McVie?)" kind of way.
She's just not as good. I often skip the songs she sings cause they are quite blah and get irritating as fuck. You don't hear anyone saying that about Stevie. Not anyone who knows what's what anywhooooooo.