"There's always one" is a common rhetorical device whose meaning is closer to "There's often one, and I easily forget the times there's not." I don't think the parent's intention was to make such a claim.
Whether GP meant to make a strawman or not, i found the comment to be a good reminder to apply the strategy GP espoused. Hopefully that’s how it’s perceived- and not as an indictment of hypocrisy.
