As a scientist- can people stop using gender like it means sex?

You have to define something before you argue about it,if you are using words but defining them differently than you'll be debating past each other. If someone says "I am using WORD-A to mean X." Then you saying, but it really means Y is useless, it doesn't address whatever point they were making.

For instance earlier in the thread someone defined bullying sort of narrowly (to exclude death threats etc). And instead of address the point, someone else quoted the "true" definition of bullying. All that does is require the first person to go back and use a different word.

I think "sexism" needs to be operationally defined (and agreed upon) before you can debate about it.