Yes, there are a lot of lighter image editing options out there, and most of them are even free. But at least my understanding is that GIMP is still predominant

Yes, there are a lot of lighter image editing options out there, and most of them are even free. But at least my understanding is that GIMP is still predominantly used by amateurs. I didn't say it's the only option, it's one of the more powerful image editing options for amateurs.