Some people don't seem to be bothered. Perhaps if they also have a Porsche or an Aston etc, then MB servicing looks cheap.
I remember one of these discussion where a poster though it was marvellous that the dealer reminded him every year about having his a/c serviced as otherwise he would forget
Or when one's tyres are really quite worn with only a risky 7mm or 6mm left.
It's good that some people are not bothered by it. They can pay to keep the main dealer network going so that people with more sense than money can run an MB relatively cheaply and still get the same, if not more, enjoyment!