Why do you care?
Did you miss the safety, environmental etc reasons?
OP, you needed to have added the disclaimer about rural hill farmers / caravan tow-ers etc.
London is packed with massive cars with a spec far in excess of the drivers’ needs or use. They use more space to park, create more jams trying to pass each other in narrow streets, make it hard for pedestrians and cyclists to see over and round them, it is ludicrous.
And the environmental thing isn’t just about the fuel and emissions, it is the sheer amount of resources needed to build the things.
I see it as being part of a wider obsession with consumer goods, looking good (though I find many hideous), and want, want, want leading to ‘I can have it so I will’. Driven by the market, and companies who push this stuff day in day out.
So many get imported from East Asia, at further environmental cost, the manufacture and labour has not been an investment in this country, etc.
This is true if all foreign built cars of course, but the more expensive the model the greater the impact.
I see car culture as deeply decadent.