Stair/ door landing interior vs. exterior?

[steveray]

Anyone have any thoughts on a 3 rise exterior stair at a slider needs a landing, but a 14 rise basement stair doesn't? Or why we treat interior and exterior differently? Visitability?

R311.3.2 Floor elevations at other exterior doors.​

Doors other than the required egress door shall be provided with landings or floors not more than 73/4 inches (196 mm) below the top of the threshold.

Exception: A top landing is not required where a stairway of not more than two risers is located on the exterior side of the door, provided that the door does not swing over the stairway.

R311.7.6 Landings for stairways.​

There shall be a floor or landing at the top and bottom of each stairway. The width perpendicular to the direction of travel shall be not less than the width of the flight served. For landings of shapes other than square or rectangular, the depth at the walk line and the total area shall be not less than that of a quarter circle with a radius equal to the required landing width. Where the stairway has a straight run, the depth in the direction of travel shall be not less than 36 inches (914 mm).

Exception: A floor or landing is not required at the top of an interior flight of stairs, including stairs in an enclosed garage, provided that a door does not swing over the stairs.

 

[Sifu]

My reasoning, right or wrong, has been that exterior doors, whether the primary door or not, would be subject to egress under stress, whereas other egress elements may not be as likely, nor be as likely to be used by all the occupants at the same time in a given emergent event.

It has also been opined that the exterior doors, require a "staging" area for people to unlock and open the door, and that trying to do so with the uneven footing is a safety issue.