At what point does health insurance no longer make sense?

Please no politics there are plenty of other places for that.

So right now as I look at our monthly budget our largest monthly expense is health insurance and that’s been the case for some time. We’re a self-employed family of 3 with no serious health concerns. Recently started to qualify for some subsidies but even then it’s pretty close to $1k/mo. Even paying out of pocket for everything we wouldn’t come close to $1k/year for healthcare.

I’ve kept paying for it because of the “what if”. What if there was some accident/illness that hit us with an absolutely devastating bill. But it occurs to me if I’d just canceled insurance and put that money into an interest bearing account or other investment vehicle over the past decade or so I’d be getting close to $150k in savings that could go towards such an event.

Of course now I’m 10 years older than I was. Wondering if anyone else has been down this particular thought process and had any knowledge or insights.