One must be delusional to believe something like this. I work in science and it is still extremely white and male dominated. All the students I teach are also mostly white and male and are very much enthusiastic about continuing in science. If anything, the people who are typically less enthusiastic are the non-white/non-male students. And understandably so, because - despite some minimal effort to change in recent times - the environment just isn't all that welcoming to them.