Can’t say, but probably yes. Again, in terms of arguments, nearly everything goes. That includes non-financial considerations, such as but I hate my parents.
Also, once you FIRE’d, having no relevant income yourself anymore, you are basically save. One prominent case (BGE 132 III 107 E. 3.3) from 2005 was a 55-year old with CHF 2.5 Million net worth and no job who did not have to pay for his daughter and her four grandchildren, because he needed the money for his own retirement. And that was before the thresholds were increased significantly!
To summarize: Mandatory family support is like the professional trader tax status. It’s not going to happen to you, unless you are a very, very special case.
Life is nothing but uncertainties, all you got to learn is how to play the odds 