That is not how this works. The team that has put an insane amount of work into No Man's Sky believe its worth a $60 price tag. If they didnt, it would cost less.
Well... no. They believe they can Charge $60. That doesn't necessarily mean that they think it's worth $60. That's to be determined. I doubt Nintendo thought that Mario Tennis game they crapped out last year was worth $50, but they hoped people would bite.
This is largely an issue of poor marketing.
No one really has a firm idea of what the game is. Is it like Endless Ocean on Wii or is it something more substantial?
It's really hard to judge a game's worth with such poor marketing efforts.