Would you be any more charitable or engaging with the entire argument if I replaced "don't know how to", an implicitly ambiguous phrase that entertains both forgetting and lack of mastery, with an explicitly cumbersome variant? "My parents and siblings have forgotten how to cook, how to learn, how to grow as humans, where my nieces and nephews never learned"?
I don't buy the unsubstantiated argument that computing is the root cause of people's willful ignorance -- if anything, we have more unfettered access to information, and that appears to have a substantial impact on reducing extreme global poverty. See other response:
Guessing about their age, your parents' development likely predated mass computing. Their inability to do these things is not caused by computers...