In short: no
The long answer:
My parents are both dead (died in 2007 and 2011), no long term care needed.
My stepfather is in his late 60s and in poor-ish health (overweight, diabetic, back/knee problems). He has many family members nearby, including my sis and BIL who are helpful. He was also frugal, single till his 40's, and has a pension, SS, medicare, and enough money in the bank to go for a long time. I don't see him needing to go into a facility. That would eat into his savings, but honestly, if 10 years at $35,000 makes him happy, go for it (he has that much).
My in-laws are divorced. FIL lives with girlfriend and her 90-ish mother. He's in his 70s. How long will he live? Will he need care? He used to joke that his kids were his retirement plan. But maybe he shouldn't have cheated on his wife if that's what he really wanted. He has 1/2 of a state pension and SS. Girlfriend worked and has done well for herself.
MIL lives with boyfriend (met after the separation). They split expenses. She has 1/2 of ex's pension, plus SS. He was an engineer, so he's not poor either.
Originally, SIL built a big house with the option of having her parents move in if they got older, but that was pre-divorce. Pretty sure that offer is off the table.
So, in short, if MIL ever needs help, she'll get it. And her mom lived to be into her early 90s. Could totally happen. FIL? Um...Going to go with no on that one, but will be willing to negotiate.