There are situations that may appear the same to most voters (sometimes possibly to all).
it is a good article, but requires expert audience
it is correct but relatively banal, i.e. it requires expert audience to read it, but such audience would find no new insights in the article
it is a crackpot article, but only expect audience can reliably recognize it
For each of those, only the expert audience can make an opinion other than “over my head”.
There is a risk that when everyone clicks “over my head”, all three kinds of posts will pass. Especially if they get an upvote or two, because people are more likely to upvote than downvote in general.
There are situations that may appear the same to most voters (sometimes possibly to all).
it is a good article, but requires expert audience
it is correct but relatively banal, i.e. it requires expert audience to read it, but such audience would find no new insights in the article
it is a crackpot article, but only expect audience can reliably recognize it
For each of those, only the expert audience can make an opinion other than “over my head”.
There is a risk that when everyone clicks “over my head”, all three kinds of posts will pass. Especially if they get an upvote or two, because people are more likely to upvote than downvote in general.