This is why the real, actual paradigm shift that could change the way many of my academic generation think about prehistoric archaeology, for example, will likely be predicated on the role of ancestral DNA. It's empirical data.
Prior, we were trying to understand (and teach others) about developments in prehistory through, basically, our own academic beliefs about the relative importance of migration theory vs cultural change ideas.
Sorry I'm massively over-simplifying this.
Anyway, as Brian Cox would say, the way we need to look at the universe not through the lens of ideology but through carefully measured and described observations. Archaeology includes resulting interpretations.
And all of this should be up for open, public discussion and dissemination, without the favour of privilege not the fear of academic sanction.
I'm going to read Alice Roberts' tweets in detail this evening to form a better opinion. But the swipe at Emma appears on the face of it to be indefensible for someone in her position who claims a public role in archaeology.
Archaeology isn't like this.