>nobody seems to notice/care as they have their minds blown

Some people do, and erroneously conclude that "space is fake". This would be laughable, if not for the part where they then persuade their friends and family to feel deceived. Artificially coloring images without disclosing it clearly upfront in a highly visible manner, ideally with some sort of watermark on the image, is the sort of white lie that contributes to the public's growing distrust of authority.

Yes, I know the caption below the image usually disclaims it. But as you say, most people don't notice or know it until somebody points it out to them, and too often the somebody who points it out is somebody who's peddling nonsense of their own.