Can you elaborate what you mean by things that science can't explain?
Everything came from randomness and is mostly narrated by it, and there's no escape from it. You may hit the lottery or end up with a rare fatal disease any time, your life will be changed and there's nothing you can do about it. It's not about god granting you awards or punishing you, it just happens. From this POV getting depressed because I went through x feels like getting depressed because water flows.
Life is painful, also joyful, beautiful and really ugly, gross and amazing. You're supposed to fall, get hurt and then get up and run a bit more until you can't anymore. Every good and bad thing will pass in time
Both parties should contribute equally.
That being said it's a grey area. When I was out of a job and my bf worked 12 hour shifts, and came home exhausted and defeated, I didn't mind doing all the work in the house. He did the same thing when I was working and he lost his job. Etc.
It's more like "I can do this if you don't have the time/energy" and less like "I am required to do this because he is required to handle finances" though. Every relationship is different so this would be better answered in relationship_advice, with context and background explained