So it is basically an example of basic knowledge. Something you'd learn in Chapter 1 of an introductory textbook. If you do not know this knowledge it is impossible for you to also know much about nuclear theory. A litmus test if you will.
Now what does this specific test have to do with nuclear energy? I'll be honest that the specific example only has a little, and that's to do with waste. These particles are common forms of radiation and knowing how they interact is important in understanding safety and longevity of waste. (our decay typically comes in the form of alpha, beta, neutron, and gamma)
I do want to be clear though, that this doesn't -- and shouldn't -- stop you from having an opinion. But it should note how strong those opinions should be, as it is naive to have strong opinions on topics you also do not care to learn about the details. This is more what I'm getting at. Strong opinions matched with weak knowledge is a dangerous situation. The key part being the strength of the opinion, not existence.
I also don't think this disqualifies other types of opinions that you can have about nuclear (or other topics). An economist could not have any working nuclear theory knowledge but also be well qualified discussing the cost. But they may also not be well qualified to discuss the cost of decommission or waste without the support/collaboration of someone with working nuclear theory. At least we can recognize that without the combined effort that the opinion is limited in accuracy. (this is also true in the reverse direction fwiw)
So for some signals that may help you navigate this space (these are not absolute, mind you, but there is a tendency).
Pro-nuclear armchair experts tend to hype up thorium, ignore costs, claiming nuclear's issue is only fear, and dismissing the waste issue completely.
Anti-nuclear armchair experts tend to exaggerate the waste issue, ignore developments over the last half century, and pit nuclear against renewables (a position no scientist actually has. Our opinion is that nuclear is a zero carbon energy source and should be _on the table_. Which isn't a strong stance btw).
But mainly I think the issue is that in a world of ever increasing complexity we are also gaining access to large amounts of high level knowledge and internalizing that as expertise. I do think this is a recipe for disaster and we're already seeing the effects of it. We see this commonly in climate discussions. Where even the pro-green people are not always aligned with the scientists albeit substantially closer in alignment than the anti-climate people. But climate is one of the most (if not them most) complex issues humanity has ever faced. Unfortunately complex issues require substantial amounts of nuance and require complex solutions. Which ironically includes political support which is hard to garner without these same high level explanations. I'm not sure there's a good solution to all this tbh.