This is because everyone wants to sell you something. I know some very good auto mechanics that make top dollar and can afford almost any vehicle. Recently some of them reminded me that top mechanics never drive new cars and trucks even though they can afford them.
I agree with everything said there but I do wish, being I have to commute to work at 5 in the morning that they use lights when it's dark and follow the traffic signals, they do not make good bumper stickers. (I have a particular cyclist in mind that likes to play chicken at an intersection I have a green light on a 5 Lane road.)
Also a possible expansion of that lists dislikes, is that I am a vegetarian cyclist.
That admission could attract some degree of hate mail !