I disagree, having need for interaction and a decent sized player base can work, slap in some AI opponents and it could be fun for many.
I could see myself picking a random direction and cruise for a few hours/days(1 week?) and setting up my own base of operations/mining etc to bring back to heavily populated areas.
Imagine being able to research and build (for an insane cost) warp gates that you could charge people a fee to use. Rather than an eve style fixed location the player base expands and makes it's own travel network.
It could be destroyed, but why would an enemy destroy such useful travel links, but then some people might! An open world like this couldwork.
Being certain it will fail rather than "could fail" is the wrong approach to think.
The point being you can't dream up or imagine the possibilities.
Think a while!
Think about what you said though, you build a warp gate after a years working gathering parts, but you've chosen a part of the galaxy no one else has ever visited and never will.
There is just too big, if you want a fight and have to travel for 5 hours before you see one person to go fight, then you die?
Infinite is a bad idea in design terms, theres a reason why every developer who has ever tried to do too much in one go has either gone bust without releasing a game, or released a complete and utter turd of a failure.
Companies waste all their time scaling back the engine/scope of a game every few months, so 80% of the work done in the first few years simple never makes it in game, had they started off with an attainable goal in the beginning, well, theres a reason why almost every successful game has started that way.
Good luck to them but, either see a game with a massively scaled down version of what they are trying, or see a game given up on, if they finish it as they want it to be right now, I'd be gobsmacked.