It isn’t a good argument against Austrian economics that someone might come up with a science that made better predictions. You have to show us the science, so that it can be compared with praxeology. Suffice it to say that this hasn’t been done.
Choosing between labor and leisure is not like choosing between apples and oranges. Many people like both kinds of fruit. But labor involves disutility,so a better choice is this: between apples and rotten oranges.