The unscheduled phone call bit is also very on-point, at least for me. In general the genZ social anxiety phenomenon seems to involve an aversion to phone calls, or at least a distate for them. I have calls all the time, but 99% of them are scheduled (unless its a family member or an emergency or something).
I pretty much consider an unscheduled phone call an imposition, even if its unintentional (IE from someone whose generation is used to spontaneously calling each other because they didn't have instant asynchronous comms options available).
Like what, you just expect someone to have time to talk to you whenever you decide to call them? And if they don't pick up, you expect them to listen to a voicemail and then call you back? Nuh-uh gramps.