On the inscription it says something, and I'm paraphrasing here that he who is worthy will be able to lift the hammer. I feel like with writers choosing to have ANYONE Captain America, Hulk, Jane Foster lift the hammer really cheapens Odin's worthiness of being the one to lift the hammer. It was a bad choice and I don't know why they chose to go down that road. We wouldn't be having a JaneThor vs. Odinson war at the moment.