You are saying insurance paid for it, not your employer, but your employer fired you for the medical bills. That makes no sense, though nothing else you say does either.
I can explain this to you six ways to sunday, and you STILL won't understand it.
Okay, try to make it simple for you. In 2007, I had two operations, costing a total of $70,000, of which I had to pay something like $20,000 out of my own pocket. And lo and behold, after six years of exemplary reviews, they tried a bunch of schemes to get me off the payroll. When those failed, they simply paid me $10,000 in "Please don't sue us" money.
They also fired two pregnant girls, and another fellow who had the same kind of surgery. There was a 20 year employee who was let go after he snapped a tendon in his arm, and another fellow who was injured on the job with a back problem. (He actually got a $300,000 settlement.)
And wow, you made your employer money "hand over fist" and they fired you for $70K? Again, that makes no sense. You kept saying it was a lot of money. I thought you were talking hundreds of thousands at least. But $70K for a rainmaker? No freaking way
It would make sense in a sensible world. But here's the thing, most of the fixes I put in were at the beginning of my career, not the end of it. This company saw employees who made medical claims as a liability, it didn't matter how long they had been with the company. (Again, I owuld point out the 20 year employee they let go.)