It does seem accidental to me in this particular case.
The more I read about successful product-market fit, the more I'm convinced that even if it's a real thing, knowing about it doesn't actually lead to any useful advice other than "keep pivoting until you've made something people really want" (or else you run out of money).
The term "product-market fit" makes it seem like a concept that is measurable. Maybe, it's measurable, but only after you've achieved it. So what does that tell you exactly? If you're not successful, you don't have it. If you are successful, you must have had product market fit. Amazing. Now go forth and make stuff that has product-market fit. Good luck.
It feels more honest to just just call it "making a product people desperately want and will you give you money for". It would simplify a lot of discussions. "We worked on this product and didn't know if people desperately wanted it or would give us money for it. Then we released it and realized people didn't want it and would not give us money for it. The lesson we learned is we should make something people desperately want and will give us money for."
Apologies for being negative, but I think I've watched too many videos and read too many articles from successful people/companies and am starting to think that survivorship bias and luck gives too much authority to advice that is actually not that useful.