I used to think the same way. Why does xyz developer refuse to do this? Don't they know that feature will be of great use to people like me?

Then I made something for myself. It took a lot of time and iterations because my needs were evolving. After it was perfectly tuned for me, I put it out there so someone else can find it useful directly or indirectly.

I started receiving feature requests and changes. I accepted a few, but rejected a a lot. This is mine. I made it for myself. I didn't step out there to build something for the world, I made it for myself and it was perfect for myself. If someone wants my stuff to do things their way and not mine, they're completely free to do so, that's why I shared it.

If I put my paintings out there and the steps I took to draw it, people are free to follow those steps and recreate mine or do it in their own way. You don't demand changes on my original painting.