"Then we'll figure something out! You can't say here if it's doing this to you, Steven!" Also who is this 'her', Lapis will throw down for you Steven, you know she will. "I don't think we have to go into space to get out of this place." Lapis did, after all, just sort of walk in. Which means she can walk out, obviously. "We can just go back the way I came in."

Yes, she absolutely knows how this place works. 100%, totally got it. You walk in, you walk out. Even after smashing someone elses property. A lot.