It also doesn't help that their only example of intellectual diversity is itself flawed, and not convincing, even to the authors.
I'm not really worried about creationism or climate stabilism competing given those conditions. And if those aren't the conditions, it's not scientific discourse.
The issue is not that scientists, or discerning non-scientists, will take those views seriously, it's that others might (or will, or do). Hence the issue is not with defining scientific discourse, it's with educating a population to be able to apply that definition (or formulate their own functional individual ones).
By teaching people to recognize where faulty data are and how they were collected. I always encourage people to look at several sources of news and figure out conclusions on their own, ignoring potential bias. [0]
It's never a lost cause to emphasize the importance of digging through an academic paper or a news article, effectively doing their own research instead of just listening to figureheads and looking through headlines.
[0]: https://www.allsides.com/media-bias/how-to-spot-types-of-med...
It takes inordinately more time and knowledge to debunk a false claim than it does to make it.
Unfortunately it takes a lot more effort to actually understand a paper then to ‘just throw it out there’.