What are your thoughts on someone abandoning their spouse when they are suffering from a serious illness like cancer or are going through a very difficult time in their life?

I only ask because my friend 46F whom I've known since she was 19, she was diagnosed with Ovarian Cancer and she's was put on Chemotherapy. 3 months into her treatment, her husband left her and cleaned out the bank account. He basically told her you're are on your own and bye.

In my opinion, someone who does that to their spouse while they're at that low point in their life is coward.