Thing is, this is not a generic STEM class (since such a thing does not even exist). This is a CS class that was working on image processing. The image in question has been used in nearly all of the image processing literature for the last 40 years. The teacher would be doing a huge disservice to the students by not using this image. They should be encouraged to compare their work to previous work. It is how technological advancement continues. The time to object to the image was in the 1970s.
I would be interested in the rest of the story. Her editorial is almost pure drivel and it seems likely that she had a lot of input from someone pushing a social agenda. Very little of the editorial discusses the image or why it might have been a bad choice. From an argument standpoint it is a complete failure because it doesn't address the primary counter-argument, that there is no better image, in any way. Maddie has done real damage to all future students at TJ. That is really unfortunate.