You are right because here we are discussing the Gambler's loses because the amount is a big amount, but no one know how many times the gambler have won such bets, because at some level he may have made the money from gambling itself to have been able to stake such an amount on an odds that look very promising but it returns in insignificant unless you stake huge amount just like in this case.
So this is gambling any ways and anything can happen no one knows the bet that will win, and at the same time the one that will win, so as a gambler, it is important to place multiple bets with smaller amount that leave you to be able to stake more bets again even when you lose the current bet, having multiple place were to support your bet is key to winning and healing from previous loses, so let the pain be put behind and look forward to a promising next bet, unless if you notice elements of addictions in your gambling activities, only then you have to take a break from betting until you heal 100%.
Well, that right really, we all should know that the idea of diversity or diversification is not something that is or should be peculiar to investing in cryptocurrencies alone, for even in gambling, specially sports betting, it's important for us to diversify, just as you have said, placing small bets in multiple places can sometimes be much better than placing just one bet with a lumbsome of money.
There was actually a day I was going to place a bet with $50, I thought of putting the whole money on one bet because I was expecting to atleast, 2x that amount, but later on, I changed my mind and decided to devide the bet into 5 places, $10 on each bet, at the end, I won 2 and lost 3 bet, and even the games I was going to place the entire $50 on was among the ones that I lost, I was happy because If I later didn't diversify the bet, I would have lost the entire $50 just like that.
It was a good lesson to learn for me..
It`s money management. If you want not only to play for process, for emotions but win - you must have strategy and follow it. Here we just see one big lose but we don`t see the full result. May be he made more than 1000 success bets with such odds and it means that his strategy is ok. I`ve seen how guys tried to catch odd 100 and i saw how they won.
As for me - i prefer make the same bet for all matches i analyzed and it depends on my "bank" - the sum i use for gambling. There are some other details, but it is just an example of strategy.