I've always found this an odd feature.
Granted I understand this is "your" mog house and you should be able to enter whenever.
I look at it this way though; my adventurer has mastered magic, played a major part in saving Vana'diel several times over and is apparently about to travel in time. Yet, the conundrum known as a desk drawer has all but befuddled my avatar.
God forbid the evil forces of Vana'diel should ever discover this.
Adventurer A: "Alright! Now all we need to do is find this generic magic stone. Where is it hidden B?"
Adventurer B: "My sweet Altana...it's in a common desk drawer!"
Adventurer A: "A drawer...those bastards."
Adventure C whilst running by franticly in the background: "Not a moogle in sight. We're all doomed!"