It was an accepted fact that rumen bacteria were the same all over the world. Even though I had shown they were not, they said it was impossible. I had papers rejected without addressing the issues they contained. I don't think it's very sensible to say that. Major breakthroughs in science often occur when people don't believe what the rest believe.
Science progresses as new ideas replace old ones.
It's the radicals who often make the breakthroughs. Yes, a ruminant couldn't live on roughage without the bugs, because these digest the tough cellulose fibre in the plants the animals eat. The animal needs the microbes and the bugs need the animal. It's a good example of design. Evolutionists would argue it's co-evolution , but I don't believe the incredible ruminant digestion system is the result of countless accidental mutations which just happened to parallel each other in the bacteria and the animals.