I'm very much an amateur but Krita is a great piece of software for me and does everything I need so far, for free. Much easier to use than GIMP, seems quite comparable to Photoshop and the development is going strong. It's also neat that they now include by default a lot of the deevad brushes as it's a broad selection. Keep up the good work Krita team.
I'd say krita and gimp fill different needs. Krita is for artists and Gimp is like Linux's MS paint on steroids. I frequently use Gimp to crop images, make memes, etc. When I used to draw with my wacom tablet, krita was the tool of choice.
Oh yeah, if steroids bring layers, masks, paths, a shitload of selection, transformation, and cropping tools, a whole lot of filters and loaders for all sorts of image file formats, complete color management support, 32-bit per channel processing and suchlike, then you might be correct :)