I wondered how far this thread would get before it became blatantly prejudiced against car drivers.
For the record, I drive my car, sometimes for fun when I don't even need to, and I don't feel even the slightest tinge of guilt when I do so.
That out the way, I actually disagree with the implication that most people are fundamentally lazy. There is an abundance of evidence that while although of course some are lazy, it's not the majority. The thriving fitness industry is proof of that.
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Far too many car drivers just fail to see or contemplate any alternative to driving, no matter how short the distance. It may not be laziness, it's more likely a complete blind spot to alternatives. A couple of examples :
I have witnessed somebody get their car out of a garage, drive ~200 metres to the local primary school, then return and park outside their house. They would have been quicker walking the child to school, not to mention setting the child's attitude to travelling short distances.
At the local David Lloyd gym you'll see people drive around the car park looking for a space as close to the building as possible before attending their fitness class.