Photoshop has unmatched tools to get work done 15 to 30 times faster than Gimp. This does not apply to everything of course and in some niche stuff Gimp's even faster. However what I use Photoshop for, such as removing unwanted distractions like trash cans, trash, overhead electric cables and such Gimp is like 30 years behind. It's not realistic that someone would spend many minutes just selecting hair outline in Gimp.

Ultimately developing these tools has cost evil Adobe many millions of dollars. 1-3 extremely talented and enthusiastic programmers cannot compete with this. Then again in the near future we will either not need Photoshop anymore, or open source projects like Gimp or a more open minded fork could use Ai generated code to develop similar automated tools.