Your broader point is right though. It doesn't benefit the app devs since 99.99% of users just use the first-party search.
I generally release all of my code as public domain, but never publish the source code to an app.
The first day I got an Android phone, the first app I wanted was a flashlight app. After clicking through the permissions on some for a couple of minutes, I realized it was just going to be faster just to learn to write my own. It's just appalling that Google, the so called "master of search" won't let you filter results by permissions required.
None of my apps require more permissions than what's required, and some require none. And people give them 1 star reviews stating the "permissions screen is blank", or back when there used to be a popup with the permissions: "Warning! This app doesn't display a permissions popup!". They've literally never seen an app that doesn't require permissions.
https://play.google.com/store/apps/dev?id=479730765079191737...