My uncle is a doctor, and he often encounters patients who say to him:

"I've never done anything immoral in my life.
Why do I have to suffer from this deadly disease?"
My uncle would tell them what his mentor once told him:
Actually, getting sick in life
is not because you did something immoral,
and heaven is punishing you,
but because you've done too many things that are unfair to yourself,
leading your body and emotions to become excessively tense,
overworked, worried, and sad.
Over time, this accumulates and causes illness.
So, you need to learn to love yourself.