This is the second or third time somebody got so lucky with ridiculously unlikely odds recently. Some people have all the luck but it’s just a lucky streak, a freak occurrence. Please don’t start thinking this is possible for you because it’s very unlikely.
Let's just think it's just a kind of lottery in the mining industry where only a few people have won it. As simple as that would rest your mind and not get a strange idea that you could also get those lucky blocks. Nevertheless, if you won't have any problem with your electricity bill, you can try to mine too if you have enough components but if you don't have anything, then it's better to stay on daily trading where the profit is assured.
It's not that easy to think imo, that means this solo miner has lots of resources or maybe with huge probability with free electricity he got in his sleeve to operate which not all miners have, imagine this his first time getting the reward, so what's his means to pay in electricity before? If not he have some asic joined in some pool but I don't think can cover the cost.