There are surely pros and cons, possibly good and possibly bad outcomes about such restrictions, and the whole matter is very complicated.

From my point of view part of the problem is the decline of education and teaching critical thinking. Science started when we realized and made clear that truth – at least scientific truth – is not about some “authority” (like Aristotle) saying that things are so-and-so, or a majority saying that things are so-and-so. Galilei said this very clearly:

But in the natural sciences, whose conclusions are true and necessary and have nothing to do with human will, one must take care not to place oneself in the defense of error; for here a thousand Demostheneses and a thousand Aristotles would be left in the lurch by every mediocre wit who happened to hit upon the truth for himself.

The problem is that today we’re relegating everything to “experts”, or more generally, we’re expecting someone else to apply critical thinking in our place. Of course this is unavoidable to some degree, but I think the situation could be much improved from this point of view.