Yes but they could be just as brilliant without having their projects funded by money taken at gunpoint, on their behalf, by people who are bureaucrats.
The argument isn’t whether scientists are stupid or not, that’s a perfectly pompous idea. The argument is that each scientists is no more or no less an entrepreneur than any of us. If he’s so convinced his research will bring benefits to himself or those around him then he can put his money where his mouth is and forego the use of the scarce resources that are required to fund his research. If he’s not willing to fund his own research then why the hell should I be?
OK, so not many people can afford Large Hadron Colliders. Fair enough. But there are a LOT of scientists in the world. Why don’t they all pool together and come up with the funds for the LHC? It just might be the case that quite a lot of the scientists out there want to conduct experiments that have nothing to do with the LHC - they’re concerned with the migration habits of airborn insect species in Botswana or something. Why should those scientists pay for the LCH? They’re pretty much persuaded they’ll get more benefit from a better knowledge of some species of fly that’s currently killing tens of thousands of tribal africans, and who’s to say they’re wrong? It sounds to me like they have a pretty strong case.
We live in a world of limited resources and we can’t study everything (even if we recognize that investing in tetsi fly research and investing in the LHC could both liklely bring benefits). So we have to choose what to research. And indeed, for precisely the same reason (scarce resources), we can’t invest 100% of our savings in scientific research. We have to spread those savings and investment across millions of different projects (some research, some housing, some food etc.) - plans that have been conceived by individuals and groups of individuals. Will all of those plans/projects bring benefits to “society” as a whole? Probably not - a good portion of them probably won’t even bring any benefits to the people who conceived these proejcts. But some of them will, and only the market can sort the brass from the gold - in science as with anything else.
In what way are the plans of scientists not constrained by the same scarcity of resources that other plans are constrained by? Is it held that the LHC should be funded by government because it will bring benefits to “society” at large? Surely if we feel we need government to decide to research such things, the logical conclusion is that we also need them to decide on the relative values of Nike and Addidas shoes. Both of these companies produce fine shoes… so surely more Nike shoes and Addidas shoes would be of benefit to “society” right? It could only be good for “society” if we had lots more Nike and Addidas shoes right? Wrong - because the making of those shoes requires resources which, if not forced at gunpoint, “society” might have spent on Addidas shoes and Nike shoes, but might have spent on something else entirely (depending on what it was “society” really valued).
In a free market, society will actually invest in Addidas shoes, as it happens, but it does not invest the entirety of it’s savings on these things - the exact percentage of society’s savings/investment which is directed to Addidas shoes is a representation of society’s values - the aggregate of people’s wants and desires. This fraction is the aggregate portion of the annual labor of all people that these people, rightly or wrongly, think they should dedicate to the manufacture of Addidas shoes. Who am I (and indeed who are you or who is government) to tell these people they’re wrong and that they should spend more on Nike Shoes than Addidas shoes? And by that same logic, on what moral ground do we stand when we tell them that they are have placed undue importance on food and shelter, or time with their families or vaccations in Tahiti over, for example, scientific research? Why should I be even remotely concerned how many muons make up a proton? Why should I value this more than a few extra days in Tahiti on my honeymoon (and thus redirect resources that I might have spent on my honeymoon to this purpose)? If I don’t value this more than my honeymoon, on what moral ground exactly is it that you would stand to point a gun to my head and force these resources from me under the guise of taxation and “benefits” to me that I’m “too ignorat” to see?