It’s an innate human desire to do everything in one’s power to save the person you love.
If you had a feeling you could do more, would you not try?
When you’re not personally involved, it’s easy to see that this might be misguided, but when living through it and experiencing daily fear of loss of your partner, it’s extremely difficult to think logically.
I have seen this multiple times and it’s always so unbearably sad.