At the same time people never really seem to be able to give a reasonable explanation as to why, beyond that they disagree with some of her takes.
From someone who happens to have been to one.
An even better idea would be people not producing these "authoritative-seeming hot takes outside of their field of expertise" in the first place though.
But how controversial is this one?
That's it, that's the entire position. I don't know, that's not a lot of substance to work with. I don't think it's a particular controversial stance. It does fit very well into her "I'm not like the other physicists" shtick, though.
With reference to 2 specific papers, one by Weinberg, the other by Shaposhnikov and Wetterich; which she claims are overlooked; and the correct prediction in the second paper. Is that not a little more substance?
Non controversial people are worth listening to as well.
I listened to many uncontroversial opinions in undergrad and grad school, and it was well worth it because they were all new to me. It's like Picasso said: you need to know the rules before you can break them. Learn the uncontroversial status quo first, then listen to the uncontroversial stuff or come up with your own. Skipping the uncontroversial would be a mistake.
on the other hand, if the authors of the textbooks don't have any controversial ideas, they probably aren't qualified to write the textbooks and will fill them with their half-understood memories of what someone else told them, which is more likely than not false in the first place. (examples abound: https://www.washingtonpost.com/archive/politics/2001/01/16/1...) ideally you want the authors of your textbooks to habitually practice the kind of critical thinking that will enable them to avoid filling the textbooks with errors, and which also guarantees that they will have controversial opinions
case in point: you're a lot better off learning chemistry from linus pauling's physical chemistry than from 95% of current textbooks, both because it's better written and because it's better thought out and more carefully written. as far as i can tell, the book doesn't have any controversial opinions in it, but pauling notoriously did; at some point he became convinced megadoses of vitamin c were great for your health. i'm pretty sure he was wrong about that, but at the time it was controversial