Yeah I hard disagree with their statement.
I've come to observe with having kids (and also moving to Germany and seeing other kids shaped) that so so much is taught. There is a ton born into a kid but so many things like the ability to think critically about a problem is actually taught in primary school and early years education (kindergarten/kita/preschool). There might be some raw horsepower that some people have more or less of with regards to certain problem spaces but for the most part - how to tackle a problem and think critically is very much a learned skill that some may get on their own but it can certainly also be given to them.
I concur with regard to critical thinking being a taught skill. My read is that parent's comment is possibly more of a vent about the type of person many of us have become more familiar with than we ever wanted to in the past decade or so of "post-truth" discourse- the virulent, intentional ignoramus. (We could write reams about what leads people to be this way, but in the interests of keeping short-form commentary short-form, I'll say that I think there are a confluence of causes :P).