The question is not only retrieval speed, but where the contamination boundary should sit
A door-side dirty-shoe bag feels convenient because it shortens the shoe-change motion.
But it also moves mud, moisture and odor closer to the passenger area.
The boot wet-gear layer works as an isolation zone
Dirty shoes are not really high-frequency cabin items.
They are items that should be separated quickly after use, which makes the boot wet-gear layer a stronger home.
Door-side placement makes sense only during repeated same-day quick changes
If the route repeatedly enters wet grassland or muddy ground and shoes must be changed several times, a temporary forward position can help.
That should remain a day-specific tactic rather than the permanent default.
The strongest system separates convenience gear from contaminated gear
Items like tissues, disposable covers or spare slip-on shoes can stay in a quick cabin layer.
But truly dirty shoes should still return to the isolated wet-gear zone.