That's why people complain. It's akin to playing a game on easy. I guarantee viewership for ANY sport/competition would decrease massively if they revealed results an hour before kick off. So of course being predictable is terrible.
There's a difference however between obvious and predictable. There has to be some other kind of option available to create that little bit of doubt.
In essence, predictable isn't bad when there's even a slither of a chance of the outcome being different. It's when that predictability is blatantly obvious; that's the problem. Ex; Cena winning the rumble a few years back or The Rock beating CM Punk at Hell in a Cell.