Sure, everything matters. But some things matter more than others. If my internet fails for an afternoon that seems to matter less than if my wedding is a catastrophe. If my video game crashes that seems to matter less than a plane crash. We call this "putting things into perspective".

I mentioned the word "humility" in another response and that is the crux of what I'm trying to communicate. It is often the case that we can exaggerate the importance of our own work and it often helps to take a step back and humble oneself. If you find yourself losing sleep over your work, if you find your anxiety levels high, perhaps you need some perspective. Perhaps you find it distasteful for me to suggest that the engineering work of air-traffic control software matters more than most CRUD apps. That doesn't mean every other kind of software has zero worth. It just provides an anchor for perspective - a kind of software where literally thousands of lives are at stake 24 hours per day. Most developers are not under that kind of stress.