Are these called safety reasons? Hardly a decisive pick. The predictor covers their own ass and is giving the underdog a chance, just in case an upset or unexpected performance from the underdog happens, so they won't get too much **** if they are wrong. We seen these predictions being made for fights where the favorite isn't known for having that many rounds taken.
Because it translates essentially to "Fighter A will give Fighter B some problems, but Fighter B will win the fight rather easily".
This. E.G.: 8-4 Mayweather is my pick for his fight with Cotto because I think the first half of the fight will be competitive and closely contested. But I think once May finds his groove, Cotto will be very lucky to win more than a single round over the second half. It's a way of predicting a competitive fight with a clear, controversy free decision.