IMHO, I believe the benifets of frequent fluid and filter changes appear later in the vehicle's "life". Anyone who is leasing their car, or truck in this matter, probably is not too concerned with maintenance because they will return or sell it in a few years.
We all know that most vehicles manufactured today are of far better quality than before. Heck, look at Hyundai. BUT, Toyota is in the business of selling cars and we should keep in mind that following their specific guidlines for maintenance (while OK,) may lead to problems later on. Those of us who own Siennas know this all too well

This can speed the cycle of trading in your old Toyota for a new one.
I can't speak for everyone, but I'm self employed and use my truck for my business. General vehicle care is a top priority for me. Most would say that i'm wasting money on needless oil changes, etc, but I keep my cars and trucks untill they are very old and sell them when finding parts becomes difficult. I own a 21 year old Toyota Van with 474,565 miles with the original shiny paint, engine and auto trans. I also have a Honda Accord that will soon see 500,000 miles( all orig as well). While my Tundra currently has only 96,000 miles I plan on driving it, and excessively maintaining it for a looonnnggg time.......unless I win the Lotto