Hamilton believes that television viewers are beginning to tune out because Vettel is dominating the sport, much like Michael Schumacher's success a decade ago.
"Personally I feel for the fans because I remember the period of time when Michael Schumacher was winning," BBC Sport quotes Hamilton as saying.
"I remember waking up in the morning to watch the start of the race and then going to sleep, and then waking up when it ended because I already knew what would happen. I am pretty sure a lot of people were doing that."
Vettel is now 77 points clear of Ferrari's Fernando Alonso.