We can have preferences about the passengers in a rocket that will have flown outside our future light cone

Can we? I mean, are you sure that whatever you verbally mean by "preferences" here can actually be mathematically formulated as a preference? How do you compute anything based on these "preferences"?

The economy is damaged

Ironically, there's this proposal to use Quantum Suicide to improve the ecomomy: http://www.higgo.com/quantum/modest.htm

You aren’t that good at building stuff.

This is a nice point.