i think one thing that the author missed is the fact that there was a distinct brand of low-brow humor that permeated all sierra games. in the early days, they weren't professionals, they were a bunch of weirdos hanging out in the foothills of the sierra nevadas making weird stuff with computers. all the jokes were lame in all of their titles, everything was corny, but people loved it because there was a sense of camaraderie in the weirdness of having and playing pc adventure games. you bought that damn soundblaster, it's gonna play that cheesy midi music and you're gonna love it because you're into this weird computer stuff made by other weird computer people and this corny faux-hollywood-wannabe thing validates your weird hobby. (and all that money you spent on video cards and modems and all that other stuff and all that time you spent chatting with weirdo sysops)
so yeah, objectively it's crap... but the same thing could be said of star wars. i never saw it until 2001 and i never understood it, i guess you just had to be there.