I empathize with this father and his emotions, but unfortunately, he did knock the Orthodox system.
It would have been more appropriate to point out that one can be just as proud even if one sits in a different section.
L’havdil, was a certain person any less proud of her spouse Mr. T.B. when he won the Super Bowl even though this person was not physically in the huddle with him? There’s time afterwards for celebrating together. In shul, as on the playing field, play by the rules which have stood the test of time.