I doubt that making money by placing bets on boxing can be easier than betting on other sports. It is worth noting that each sport has some nuances that may not be reflected in statistics but may have a decisive factor in the outcome of the match. I mean that nuances may be obvious things for fans but not for ordinary users. So I personally prefer not to place bets on sports that I don't know much about.
Well that just depends what sports you know lot about. If it's boxing, it's definitely easier to bet on boxing then basketball or egaming if you don't know squat about those. Just betting on statistics depends on what statistics are you using about. If you talk about multipliers in casinos, you will eventually lose if you are trying to just make safe bets without knowing the reasons behind them.