My wife and I have a 2003 Honda Accord, we got the light signal right about 70,000 miles. I have taken it in and everything checks out jut right. I give it a maintenance every 3,000 miles without a fault. So yes I believe it has something to do with job security. If all cars need to come in at about 70,000 miles there will always be a lot of work. I do believe there is a conspiracy on this matter..