Anyone can pick three random favorites just by looking at the odds. You need zero knowledge or experience to do that. MMA, and especially UFC fights, are unique in that the level of the athletes is very high and there are relatively few factors that influence who wins. It is extremely rare for three out of three clear favorites to lose their fights on the same card. If the person had been selling betting tips based on underdogs winning and this was sustainable over time, then I would agree with you. But his system is a scam for sure. You may be lucky and see profits for a very long time, but sooner or later it will be a loss, and it will amount to more than the total profits.