Prohibitions like this one are overly broad and smother a lot of legitimate discussion. Exceptions to free speech used to be limited to things like:
* Don't yell "fire" in a crowded theater.
* Don't call for violence.
If we broaden the scope to any speech someone, somewhere might take offense to, then we can no longer have much diversity of thought in public debates.
If these kind of "hate speech" laws existed in England in the 19th century, Charles Darwin would possibly never have published the book "Descent of Man", because saying "You and I both descend from animals" was a very demeaning thing to say to most people at the time, and therefore could have landed him in court. The very idea of biological evolution is still offensive to a lot of people today, BTW.
A stark warning that this concern is not a sterile theoretical exercise came in August this year, when James Damore was fired from Google: https://en.wikipedia.org/wiki/Google%27s_Ideological_Echo_Ch...
So a company that champions and celebrates science to the outside world (like in their many doodles about scientists) and that has control over much of today's human communication, believes at the same time that it is a thoughtcrime to cite the scientific consensus about something as basic as biological differences between men and women.