At the end of the day if you care about Bitcoin you should be mining it even if you mine it at a loss, this helps the network and ultimately helps your holdings, so it would be like paying a subscription fee to something sort of thing. Like paying someone to store your gold in a vault, but your miners are the vault.
Well, if you cannot do anything with your money and buy a miner that's costly, you can do that. But it's not the only way to help the network, run a node if you want to help. But spending a lot of money for miners, won't be worth it when the difficulty of mining keeps on increasing. Good for that solo miner and it might have been long for that guy until he got that reward. It's another lottery block for that person and I think I've seen the same stories for the past several years.
Yeah, these type of things happens time to time, there are people who solo mine and there are people who make money from it as well. I do not think they have only one machine though, I think they have multiple machines, it is just that they are one people, not a pool, that is the trick here. The solo miner getting the jackpot is fine, it is a good news, as long as this doesn't make anyone spend incredible amount of money for a very low chance of same result, then just promoting the benefits of mining and showing how someone got rich is fine.
Plus, as calculated above, in most cases, you can't even break for 4+ years in any normal case, only if you get lucky like this that you could actually end up making a profit from this.