I'm the author, and I totally agree! Originally, I was going to point out other null hypotheses that we could try to reject. This has the advantage that some

I'm the author, and I totally agree! Originally, I was going to point out other null hypotheses that we could try to reject. This has the advantage that some of them (like the one you propose) model the physics. And it also has the disadvantage that if we propose too many hypotheses to test, then we will be more likely to get false positives. But the article was already too long, and this is a HUGE can of worms to open.