True, but there could be some instances when someone gets into a building they don't have the requirements for yet because they're standing on that spot. What does Jagex do about these people?
Whenever Jagex has made major changes to the geography of an area (the Burthorpe/Taverly rework or Lumbridge Crater, for example) they tend to teleport anyone in those areas away, usually to their chosen respawn point, ot avoid issues like logging in over a lake that wasn't there when they logged out or getting stuck in a ladder or whatevs. If, for some odd reason, someone still logs in and finds themselves stuck, they can either Home Tele* away or, if there are enough problems with the area, PMods will make themselves available to tele the players to a safe zone outside of the glitched area.
*Interestingly, the Home Teleport spell originally only went to Lumbridge, and was put into the game to help new players get back to a familiar place if they ever got lost in their explorations, or got stuck in a buggy area.