Indeed. Dice is a part of luck-based games. Sure, there is a very small chance to win Dice in a row because it just relies on the luck. Even if he can win again in the next attempt, he may begin to lose in the next 2 or 3 attempts. TBH, I don't see any pattern that we can learn from Dice. It is not like the skill-based games. It is purely about luck, I think he is not serious to say "studying pattern".
We can only wins for once or two but will lose more than that. If we can not control ourselves in dice game, we will lose all and regret it. But we don't know for sure about the pattern as we don't see the pattern like him. After all, he can test it for more to see if he can finds the pattern as before or he really needs luck to wins which I guess he must have luck to win.Of course, we only can win betting if we choose the better/right team. 
I don't say the luck has no role in betting but it is not purely the same as in Dice. I'm sure the role of the luck is smaller in betting, analysis will have a bigger role. Especially in sports betting, we should analyze the current performance of the teams (stats), condition of the players, the possibility of the tactics to use, and some other things. So, we don't totally rely on the luck in betting because we should analyze some factors.
In sport betting, we can do analysis to pick the right team but we still need luck to win. We can not deny that because we may see a change in the sport especially if the weak team can change their strategy and push the strong team so they can win from the strong team. That is happen many times in the sports so that is why luck still needed. But with all things that related such as luck and analysis with the other things will gives us the chance to win.I don't say the luck has no role in betting but it is not purely the same as in Dice. I'm sure the role of the luck is smaller in betting, analysis will have a bigger role. Especially in sports betting, we should analyze the current performance of the teams (stats), condition of the players, the possibility of the tactics to use, and some other things. So, we don't totally rely on the luck in betting because we should analyze some factors.