Earlier quoted context omitted.
I think you highly overestimate the amount of research the average person does on a printer purchase. Yes, some people will buy a CR magazine or ask their friends/relatives opinion for a $30k car, but will they do that before buying a $60 printer?
True, but I would have figured that by now, so many people would have had bad experiences with inkjet printers from HP/epson/canon that they would have sought out that information. Or maybe even retailers would promote it so people are more satisfied with their purchases.
"Hello Best Buy / Staples / Office Depot salesperson, I need a printer."
"Well, I'd recommend (insert whichever manufacturer currently cutting retail most margin)."
"No, a friend had a bad experience with them."
"Oh, then (insert second highest margin)."
(Repeat)