What do you mean the point is exactly that?

The technology does scale, not only are there national sized diesel generators that power the grid, there are diesel generators that run on the gas that landfill and farming make (That would normally escape into air as raw methane.)

In your original post you're suggesting that that a car is a poor choice of transport the same way a diesel generator is a poor source of power for a home.

It ignores the point that there are specific use cases for both diesel generators and personal vehicles e.g. where there are no alternatives in rural areas or areas where the infrastructure is limited - mountainous regions, out in the bush in Aus, the scottish Highlands, the Swedish archipelagos and almost everything north of the arctic circle require both a reliable source of electricity and a personal vehicle.

My personal argument against this kind of thinking, even as someone living in a developed country, was that almost every blue collar worker requires a vehicle to work, which cannot be replaced by public transport, given the nature of them travelling between jobsites and the requirements for carrying cargo and tools.

I'll agree, when living within a city that has full infrastructure, easy access to amenities and everyone who works in the city lives in the city this makes compete sense as an argument, why put a diesel generator in when you've got power hard wired into your house, but scale your point of view past America, and you'll see it's less black and white.