There are usually Linux alternatives but my understanding is that they don't compare to the originals.
That has not been my experience. I've used a lot of the high end stuff on Windows, and I actually prefer, say, GIMP/Glimpse, Krita, Kdenlive, Darktable, Blender, and the like. Usually, when people say this, all they really mean is it has a different workflow to do the same things. Workflows and features improve as the user base expands, so the only way to solve this is for more people to use the FOSS alternatives and provide tangible, specific feedback.
That has not been my experience. I've used a lot of the high end stuff on Windows, and I actually prefer, say, GIMP/Glimpse, Krita, Kdenlive, Darktable, Blender, and the like. Usually, when people say this, all they really mean is it has a different workflow to do the same things. Workflows and features improve as the user base expands, so the only way to solve this is for more people to use the FOSS alternatives and provide tangible, specific feedback.
It sounds like the author hasn't even tried any