That I can have someone translate to and from Urdu for me does not mean I have the social skill required to communicate via Urdu. Likewise, that your parents can ask you whether something is spam or not doesn't mean they have the social skill required to communicate via email.
Wikipedia defines social skills as:
"A social skill is any competence facilitating interaction and communication with others where social rules and relations are created, communicated, and changed in verbal and nonverbal ways."
If the ability to effectively communicate via a medium doesn't satisfy that definition, what does? You are welcome to use a different definition, but that's what I am referring to by social skills.