Yes people can have a different outlook. I just think it should be split down the middle.
That's nice in theory but what you will do in Real Life (TM) is to compromise. What's important is that both parties accept that their respective workloads are fair.
"In the middle" considerations, btw, should include the law school anyway because (and I'm assuming things here) it will benefit both of them. My guess is that it was a joint decision.
Now, if she wanted to study, too, things might be different.