Older people aren't stupid and awful, they are just generally more set in their ways, and factually ARE more vulnerable to misinformation and lies, which is why they're the most vulnerable to scams.
The previous generation, at least in America, was far more repressed and had far less access to information than we do today, which results in more narrow-minded beliefs. Not all old people are like this, but the comment you're talking about said "old people don't trust ai" which is not true. Old people as a group do, this person as an individual in that group does not.