I don't mind outside writers if it's done naturally when the band wants it to happen. What I don't like is when record labels force "hit writers" to work with the band against their wishes. I get it. There's money at stake, labels want hits and all that, but it just rubs me the wrong way.
I used to be with it, but then they changed what "it" was. Now what I'm with isn't it, and what's it seems weird and scary to me, and it'll happen to you, too.