There’s no “special” reason to view the adults you grew up with as better or worse caretakers. Statistically, it’s likely they’re equivalent to many others.

Still, this over application of logic refuses to let us be enthusiastic about anything unless there’s a scientifically documented reason towards it. It’s nice to have reasons to adore something, even if that thing is a country - but the comic is making the point that you should still want to find flaws in and improve that thing.