Why won't Oregon let the local drivers fill their own gas, but only the rurals

 We know New Jersey doesn't let drivers fill their own gas, all the stations must be served by attendants. This goes so far that I know people who're well into their mid/late twenties who don't know how to fill gas because they've always been served by attendants.

What I discovered during the California trip is that Oregon works the same way. Because of old laws that assumed regular drivers didn't know how to deal with dangerous substances such as petrol. Buut buut buut there's a catch. In the cities and urban areas, self-service is allowed. It's only in the rural parts where you absolutely need attendants. Which makes me wonder, does the state of Oregon believe that the rurals are somehow stupider or less competent than the urban dwellers, such that they cannot be trusted with filling their own gas but urbans can?

You think with hollywood and american tv shows etc, the country would be all the same but discovering these little differences and the cultural attitudes towards those is a surprising revelation.