This unfortunately seems to be rather common (at least in the US), John Oliver did an episode on it a short while ago. It has a lot to do with the history of th

This unfortunately seems to be rather common (at least in the US), John Oliver did an episode on it a short while ago. It has a lot to do with the history of the medical field as opposed to modern Mal-intent. For example a lot of testing was done on men and then that data was taken and also used for women. If you search for "John Oliver medical bias" you'll find the video.