I'm not sure how you can say a bad vocalist! Benoit David was the replacement of choice for Jon Anderson in Yes --- in fact, he sounds a lot like him: almost uncannily so --- so if you're saying he's bad then you're also saying Anderson is bad, and that just proves that you're making a very false assumption here, as love him or loathe him, most will agree Jon Anderson is a very talented person and a great vocalist.
Also, this discussion would be better held in the progressive rock subforum, if a mod might be kind enough to move it?
Whiskey, put down your ninth Jack Daniels and try this.