To biologists, we're all just masses of cells. Biology is all about de-mystifying life. In addition, the claim that "male" and "female" are arbitrary categories has some "truth" to it, in the sense that all words just mean, whatever we agree they mean.
If all the familiar words were taken away, biologists would just invent new ones, define them, reference them to earlier work, and would keep on trucking as before: individuals that are adapted to generating the large gametes could be called goobleglorks for all a biologist cares. You just need one paper that says, "The individuals adapted to generating large gametes were formerly known as female, see references 1 through 12. These individuals will be referred to here as goobleglorks, however possess all the same features as in the category 'female' as described in references 1, 3, and 11. For further details see references 2, 4 through 10, and 12."
What scientists do will not change with the elimination of female as a coherent category. What will change is the public's understanding of what scientists do, a la kids in my children's high school friend groups telling me (a qualified biologist!) that male can too become female duh what century was I born in? Boomer!! That is what bothers me, is that scientists are colluding with misleading the public about what it really means to be male and female, by nodding along when we're told that the categories are meaningless.
I do think that one factor is that scientists' jobs are maintained by "funding." Someone has to approve of them and their research. So they don't have the power over what passes for "truth" that we think they do. Also they are generally quite privileged people in the sense that to get to be a working research scientist a lot of things have to have gone right in your life. So their idea of what is "true" socially is filtered through the lens of their experiences.