What we learnt here is: Instead of naked options, he could have sold vertical calls, where his losses would have been predetermined and limited.
Losses predetermined and limited at the cost of having a lower probability of profit. If spreads were so great, everyone would be trading them. I sell mostly naked and it's worked fine for me. I keep my position size small and spread my risk out over lots of different positions. The more speculative and volatile the stock, the smaller my position size.
You can make money 99% of the time selling it. But you will get rekt 1% of the time being naked.
If the premium always went to 0 by expiration, no one would be buying options. There has to be a non-linear payoff in order to make it attractive. Insurance companies have been doing fine for many years by operating a similar model. Most of the time, they happily collect $1000 or so a year from every customer, but every once in a while, there's a million $ payout.