Totally agree with your point. But to be fair, rapeseed oil is less common than its relative canola oil. The rapeseed wiki article says "Canola oil is limited by government regulation to a maximum of 2% erucic acid by weight in the US[4] and the EU,[5] with special regulations for infant food. These low levels of erucic acid do not cause harm in humans.[4][6]".
I didn't look at the references but I'm skeptical of their claim that 2% does no harm.
