Sometimes, an individual can do everything "right", and yet disaster will still strike them. Sometimes, people act carelessly, but it is others pay the the bulk of the price.
Life is not fair. There is no higher mystical (or not) force that would make things just.
I strongly believe that the whole goal of the existence of "society" in general should be to make things easier for us. That everyone should strive to make things more fair. Have safety nets. Everyone should help protect each other, or at the very least, avoid harming others. We already have enough on our plates as living beings.
The world is a cruel place. We live. We suffer. We die.
Why not make the suffering lesser?
I know that it does not matter what I believe about what "should be" or how the world "would be" if people acted differently.
But somehow I just can't accept this. It would be easier to let go and accept things the way they are, but I just can't.
I did everything as right as I could, and yet I still got sick, and right now, I am losing more and more of myself, most likely as a more or less direct consequence of COVID. If everyone wore masks, the risk of that happening would have been smaller.
But there is no justice. Not in this world, not in any other.
Unless you act. The pandemic is not over. Wear a fucking mask.