I have a different take on this. First of all, I follow Rhett Allain's article frequently and I find his point of view is often interesting. Secondly, while I have not been involved in a purely online class, I have taught blended classes where a substantial portion of the lesson is done online. So I have a flavor of the issues surrounding online lessons and classes.
While I agree with Allain's take that an "education" (not simply a class lesson) involves more than just the material, I also think that the issue of online education and online lessons have problems directly, not just esoterically. The past many years, there have been numerous research on physics education that showed that passive learning that many of us are used to is not the most efficient and most effective means of learning, especially for non-science majors and non-physical science majors. So there are efforts to change how we present the material to the students which involve a significant portion of active learning, and there are research to back a number of different pedagogical and methodological approach to this.
I'll give you one example via Eric Mazur's "https://www.uq.edu.au/teach/flipped-classroom/docs/FAB/FABPeerInstructionTipsheet.pdf" technique. Here, the instructor becomes almost as a coach, directing students into the correct understanding of the concepts. But it is the students who are actively participating in the class where they are not simply sitting and listening passively. A lot of studies have been done to show that this method is
more effective than passive learning, and a lot of schools are adopting this technique at the General Physics course level.
This active learning is what can't be done (at least, not easily) with online lessons or classes. Inevitably, online lessons involve someone sitting in front of a PC or electronic device, often alone, and either reading or watching a video. Even in an online class where there is live interaction with the instructor and/or students, active learning that is required in Mazur's Peer Instruction is simply tedious and slow to do.
So, while online learning is new and makes use of the latest technology in teaching, its philosophy and methodology are actually quite old, because it is still essentially a passive learning. It means that the students are not learning the material in the most efficient and effective manner when compared to those who are engaged in active learning. The students are not just handicapped for not having the "college experience" and a broad education. They are also hampered with an old and inefficient way of learning.
Zz.