IMO the prime difference between Biden and Trump is Biden being a traditional old school president (Reagan, the Bushes, Clinton, Obama). In contrast the new Trump Way replaces the cumbersome old
bureaucratic way of the past.
IMO, Trump in looking back to his previous administration, he feels there were too many of the old guard among his political appointments to make a positive change.
Thus, Trump is more than willing to see his new gang make a few mistakes by not following protocols (as in the recent alleged security breech)