We all want the lightest bike we can get. It'd be fairly stupid not to.
What makes the difference is how we balance weight savings with the other aspects of living and riding.
For example, if you really wanted the lightest bike you'd by a unicycle or, if you insisted on two wheels, a road bike. But unless they meet your riding needs they're no use.
Secondly, lighter bikes are expensive. Whether the grams saved per $ is worth it is likely to be a function of how much cash you have and what else you need to spend it on. Why spend more than you can afford if it means spending less time riding?
So if you've got money to burn and need a 6inch travel bike, buy one.
Personally, I find my Scott G-zero Pro does the job.