Actually yes. The golden rule of selfhosting is that you don't host for others. Then you are just hosting, with all the annoyance that comes with it. Also I might have different needs than my siblings, different software, settings and so on. Extreme example: police warrant for a sibling, and they take the family server away? Who is legally responsible for what is hosted there? Families could share a single car, or a single bathroom, realistically multiple families even - yet anyone who can afford it will opt to avoid that.
So along with sovereignty I will always opt for the most independence and freedom. The only reason people think otherwise is because because of alleged technical infeasibility.