Lol it's hilarious you pretended to ask a genuine question when you already knew the answer for your marriage. In fact you intentionally withheld it as some kind of poorly executed trap. Talk about a bad faith discussion.

Not all marriages involve people with the money to continue supporting the children when both rather than just one parent is bankrupted by medical debt, and not all disabilities end with being able to drive and walk. Usually don't involve people privileged enough to get "best in the world" Neurologists either.

There are people out there that may have to divorce precisely because they can't look their kids in the eyes with the marriage as it stands due to the disability, knowing a divorce will separate the finances and possible allow them to find more support for their child. Every human is susceptible to caretaker fatigue and you yourself can't possibly know you would never get fatigued if the disability never ended. Some people can go a 1 year without cracking, others a decade, others 100 years and until it happens you probably won't know your breaking point.

The fact of the matter is I get to see the people that deal with hundreds of seriously chronically disabled people. My dataset to work with is that it's a bad bet to expect that the counterparty will sacrifice themselves indefinitely for the sake of the marriage.