"It's another word for the living," Beetlejuice explained. "Yeah, don't look at me, lady. Stuff's probably made more people happy than not happy, but, what do I know?"

He was a little irked about not having his full range of powers, so he understood feeling put out about being there.

And he felt she had a point. "The more stuff we have available, the better it is if something goes wrong."

His concern was keeping Lydia safe, and he didn't see any reason a lady doctor from the 19th century wouldn't be able to help in that.