I used to do this too, and like you, I've now grown to really dislike it. My reason is different, though: the App Store app has _plummeted_ in quality. It's now so hard to use, I don't bother using it.
1. The UI is all over the place. Some UI controls cause pages to swipe up from the bottom. Some cause pages to swipe in from the right. Some cause modals. Whenever I click something, I have no idea what it's going to do. Here are some examples: https://grumpy.website/post/0RsaxCu3P
2. It's full of bugs. I have witnessed the App Store lose track of whether an app is bought or not, downloaded or not, or installing or not. Another example: https://grumpy.website/post/0SU9WNFXB
3. It makes the rest of my system worse. Every week or so, I get a message like "Fantastical cannot be updated because it is open". I didn't set it to update. I had no idea it was even updating. I just get an obnoxious dialog interrupting my work.
The App Store used to be like a shopping mall — I'd browse the shelves, see what was new, and maybe buy a small app I liked the look of once in a while. But now it's become so hard to browse, I don't bother paying. Everyone loses out.