They were not the densest ones I could find. Not by far. I'm surprised you even thought of it. How many science articles not in your field have you read?
Take a look at the other articles in the current issue of Cell, at http://www.cell.com/cell/current . (This is one of the journals with the highest impact factors, so is less likely to consider the deliberately opaque language you mention.) You'll see the one I gave was not even the densest in that issue. Here are the titles to some of the others:
"Fast-Spiking Interneurons Supply Feedforward Control of Bursting, Calcium, and Plasticity for Efficient Learning", "In Situ Structure of Neuronal C9orf72 Poly-GA Aggregates Reveals Proteasome Recruitment", "5-HT2C Receptor Structures Reveal the Structural Basis of GPCR Polypharmacology", "Abstract Image
Multiscale Structuring of the E. coli Chromosome by Nucleoid-Associated and Condensin Proteins", or "KRAS Dimerization Impacts MEK Inhibitor Sensitivity and Oncogenic Activity of Mutant KRAS".
I submit that your original statement, that "most people who studied an empirical discipline in college and did ok (good school and/or good grades) can pick up a paper and, using the internet, understand and critique it creatively within three weeks." is woefully undervaluing the expertise needed for each field.
I have 3 years of post-graduate education in physics. I can't read a chemistry paper for the life of me. I never even took organic chemistry. I find the idea that I can critique a paper on, say, some new reaction, with only a few weeks of internet-based research, to be ludicrous.
I note that you appear to have changed your statement. Originally it was just college, and now it's "another 3-4 years of post-graduate education." Originally it was "creatively within three weeks" and now it's "understand journal articles" with no time limit.
It feels like you think my objection to your original claim is representative of some absolute stance of mine against amateurism. As an amateur historian, I do not see how you have made that shift, nor do hold that opinion.
I don't understand the relevancy of your second paragraph at all. People get into quackery and pop science because it seems easy, and it comes with the built-in belief that experts are wrong and can be ignored.
If anything, it is the quacks and fringe science people who believe that three weeks of research is enough for them to be able to critique the standard views on evolution, global warming, chemtrails, pyramid construction, shape of the earth, etc., and critique to such a level that they should be listened to.
Nor do I understand the relevancy of your third paragraph. Could you clarify how you drew that inference from what I wrote? I am not connected to an institution with journal subscriptions yet I read and understand journal articles (acquired through ILL, links from Google Scholar, and yes, even Sci-Hub), so obviously I think it's physically possible for that to happen.
Are you sure you haven't just misunderstood my previous comment?