Comparative embryology is not an important focus of evolutionary biology today so why is this so important? The fact that inaccurate drawings were included in high school textbooks long after they were shown to be inaccurate is hardly surprising. High school textbooks, science or otherwise, are not known for their scholarly accuracy. They are more along the lines of popular publications - often watered down to make them easier to comprehend and scientific or historical accuracy is sometimes lost in the process.
Besides, the fact that some showboating evolutionist may have committed a scientific fraud over 100 years ago - and some profit minded texbook writers and publishers may have perpetuated it - does not make any difference as to the accuracy or inaccuracy of the TOE. The TOE stands on its merits, regardless of the failings of people who may support it. So why don't we argue current issues in evolutionary thought, such as DNA homologies among related species, rather than dwelling on the past?