He didn't pick the lock, he had a key. How he got hold of one is curious, but I do think that if DPC is going for dark foreshadowings (and that does seem to be there way), having him not be there when they get back in a near-miss moment would be far bigger than if he is there because, with the key, he could come back at any moment, most likely when Maya and Josy are alone.
I always dislike that phrase, "it's more about the journey than the destination", because you could have a perfectly pleasant road trip where you see lots of interesting things and meet interesting people on your journey, but if your destination ends up being wrapped around a tree and your body crushed, then I don't think the journey was all that worth it.
If this happened then it's total game logic because just standing up for someone like this in a strong way barely works in the real world.