I am pretty sure the issue was using private server for work. Using gmail for personal stuff is most certainly ok. Another temper tantrums of ignorant bloggers. Using unsecure phone is probably is the no no. And he should stop.
BTW if the “american public” — whoever you bunch in this basket — doesn’t know how secure or unsecure gmail is, they should educate themselves instead of telling people to stop. Enough with this rule of incompetent.