People would benefit from living in smaller houses when it comes to heating too. Should we legally mandate small rooms with claustrophobia-inducing celling heights?
People like different things. Some people like their pickups. Maybe they find their size more convenient and comfortable. We don't know that. We do know that people made that choice out of their free will.
Cars and trucks aren’t the issue we should be arguing about. Nothing is being done about shipping, cruise lines, and big industry. It’s a classic tactic for corporations to focus the government on individuals instead of themselves. Here you are falling for it hook, line, and sinker.
Not sure what you mean, there's plenty of regulation on those. Eg most of the world has just recently gotten much stricter about what fuels you can burn in ocean going vessels. Though maybe not as much regulation as you want? Or the wrong kind?
In any case, I mostly agree with you. And regulation shouldn't focus on micro-managing individual people or even individual industries: just tax emissions, and let people sort it out according to their own preferences.
No need for any politicized discussions about lifestyles that way.
(If other countries don't follow suit with the carbon tax, just do adjustments at the border like what countries do for VAT. That'll automatically also do the right thing for the other countries that do also have a carbon tax.)