You lose two choices when you die: you can't buy the car and you can't save/invest the money. That's because you are dead.
I understand your argument. Conservatives spout "Double taxation" as the reason against an estate tax. It's not a good reason by itself. The reality is that you don't want to pay more to the government and this is another battleground for it. You would happily exchange a higher estate tax for no income tax, I bet; and I bet you would be upset if your income tax rates went up by double but the estate tax was eliminated for everyone.
Society doesn't benefit if vast amounts of wealth are transferred to succeeding generations.
You are wrong. I would not exchange a higher estate tax for no income tax. I believe there is a purpose to an income tax and no purpose to an estate tax (other than to just tax something because liberals like to soak the rich). Therefore, since I am a man who follows principles, I would disagree with your statement 100%.
The income tax does not need to double to compensate for no estate tax. Tax rules can be simplified and revised to become more fair. We simply choose to not do it.