Because the health insurance/medical industry situation in America is objectively criminal.
This is why the quality of health insurance offered by a potential employer is such a huge consideration when looking for work in this country, sometimes outweighing prospects of salary or hourly pay. With even moderately decent coverage a bad accident can ruin your life financially.

Man people always complain about this but it's super easy to get out of these without paying nearly as much.

1. Call and ask for an itemized bill.

2. Get bill 3 months later and see the price hasn't changed

3. Call and ask about a payment plan

3b. Make less than $10k a year so you qualify

4. Go back in time and get health insurance

4b. Go back and get health insurance that doesn't have a $12k deductible

4c. Go back and get health insurance that has a low deductible and actually covers at least half of your treatment

5. Maybe just don't get run over by cars. Or get sick. Or inherit genetic diseases. And for the love of God don't get hurt on the job.

It's really that easy.