We already have age limits at the lower end. Why are people so against age limits at the upper end?

Probably because some people age better than others? I’d argue term limits are probably a better solution to this problem. Although, people could also have the courtesy of resigning when they’re clearly too old for the job.

The one that drives less than 500 miles a year?

That’s not as relevant as it might seem, as producing the car is about half of its lifetime emissions. And producing big cars results in more emissions than more reasonably-sized cars.

For example I’d love to buy an electric car but they’re just far too expensive for me to be able to afford. I need something, so I get a cheap and 2nd hand car. Inevitably that is an ICE because even second-hand electrics are hugely expensive. Yet somehow I’m the one targeted?

I think the goal is to target people with huge, luxury cars. Anything else doesn’t make sense at all.

Win people over, probably not. However, it might discourage people from driving/buying big cars.