Here's the thing: "normal users" looking for a free-of-charge alternative to commercial apps are not the typical target audience of open source productivity tools. They're primarily targetted to scratch the authors' own itch, and secondarily to benefit anyone who finds it useful in the hopes of more contributions.
Average Joes (nor non-contributing professional artists/photographers) are typically not beneficial to these projects, at worst they are a hindrance: tons of help requests (in the bug tracker), low effort bug reports, requests for Windows/OSX binaries (without offering to help in maintenance), etc. You can find some ugly examples if you look into bug trackers / mailing lists of some of these projects.
We can only hope that a benevolent philanthropist comes by and drops a few million dollars in to getting full time, paid developers into GIMP, Blender, Inkscape and all the other open source productivity tools but until that happens it's a mostly volunteer effort and the contributors can choose what to focus on.
If Photoshop suits you, great. I've managed to do all my image editing in GIMP for the past 20 years and I'm very glad the project exists.