Why do people get mad over the fact that their cars require full synthetic oil?

I work as a mechanic and found some people do not like the fact 2010 and up toyotas and Hondas and almost all 2014 cars and European cars require full synthetic oil. A majority of the anger comes towards toyotas and Hondas. Despite me explaining the increased intervals, they still get angered at the fact. Is it just me or does less time doing oil changes that save you more money in the long run end up coming out cheaper despite the increased price and why would they be angry saving money?

Expensive

People are willing to drop $30.000 for a car; but resent having to maintain the vehicle. There are still a fair number of mechanics and consumers that believe synthetic oils, as well as lighter viscosity oils are destroying cars. I, ve been an amsoil user for over twenty years. I know synthetics with extended drain intervals work, and well. My sis still believes that the head gasket on her junker car failed because of synthetic oil. Ignorance is not a virtue.

People don't like to change. They could have a full electric vehicle that doesn't need any oil changes synthetic or "natural, but tend to prefer the "old ways." It is left to those not so attached to a well worn path to try and show that there's a better way.

It's expensive.

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