Yeah OP, I have to agree, it's shortsighted.
But I did it a few years when I was younger. I also didn't even go to the doctor for years and years. I was never sick, so in my mind, why go where the sick people were? But once I started a family I got a catastrophic plan.
I've been self employed since my 20's so I've learned to get my own insurance and take care of my own health.
I also do all the things you talk about: live in the country, eat healthy, stay fit, etc. Low blood pressure, good weight, no alcohol, no tobacco; I impress my doctor at each yearly checkup, lol. I have a job (carpenter) that keeps me moving.
I agree it's a good idea to get that blood work every year to see where you are.
I get a lot of subsidy help because I'm fairly low income; I have a high deductible ($6900) HSA plan that costs $49/mo, with a robust HSA account.
Good thing, too, since this year I'm needing an endoscopy (approx $3100, plus whatever followup depending on what they find), a hip replacement ($unknown), physical therapy, and possibly back surgery. Once my deductible is full insurance will pay for all of it. $6900 out of pocket.
When my daughter was born my ex wife almost died. That bill would have been well over $100k.
So don't wait too long to get insurance