I think what the author is missing is the possibility that many academics are simply bad writers . Academic writing in many fields is extremely formulaic just so that the relevant information can be communicated regardless of the writing skill of the author. Add to that the fact that many academics are writing in a language that is not their first, so even if they had considerable skill in their mother tongue, there…
I was actually intending to do graduate work in archaeology but switched to history when I realized how dreary the prose style favored by archaeologists was. At least history has a few authors with an engaging and original style (for instance, Simon Schama, Fernand Braudel, and Natalie Zemon Davis). To be fair, archaeology has some interesting prose writers of its own (Colin Renfrew, Marija Gimbutas) but the ordinary journal article style tends to be a morass of passive voice and clichéd phrasing.