Earlier quoted context omitted.
The quality of evidence needs to be very, very high to justify discrimination in my opinion.
And if people responsible for awarding research grants within tech decide not to investigate whether there is discrimination against women, or tech companies decline to give full access to their data. Then the quality of evidence that you demand can't exist - in that case, should nothing be done about it?
If you want to discriminate without sufficient evidence, I am plainly not with you on this.
It is the simplest form of power play to treat people differently because it breeds jealousy. Jealously can lead to discrimination as well. You can do that as a team leader and be sure that people are more concerned with each other than holding you accountable. This is actually a common behavior in corporate office culture which had many tech flee the premises because they had a choice.