It's perfectly all right to say that there are statistical differences between the average biological man and the average biological woman.
The problem is to then assume a gigantic pile of facts not in evidence (that the differences observed are 100% biological with no cultural influence whatsoever, that they conclusively explain gender disparities in many fields, etc. etc.) and accuse anyone who disagrees with you of being one of those terrible mean lefties who will unperson you for speaking the truth.
Generally, this type of person lasts up until the moment blind interviews become widespread.
The problem is to then assume a gigantic pile of facts not in evidence (that the differences observed are 100% biological with no cultural influence whatsoever, that they conclusively explain gender disparities in many fields, etc. etc.) and accuse anyone who disagrees with you of being one of those terrible mean lefties who will unperson you for speaking the truth.
Generally, this type of person lasts up until the moment blind interviews become widespread.