Well put, albeit a little quick ha. While Trump is objectively simple, my dislike of him both personally and professionally (politically) isn't dictated by what traditions are kept or his pure opinions (unless acted upon). No one should give little more than two fucks about whether a President participates in activities which have no bearing on performance.

Keeping with tradition is often good for public opinion, but in this case the "outrage" is likely the same as if he would participate in an interview.