Most AAA games have established game franchises that already have all the game mechanics worked out and the company infrastructures setup from previous titles.
It takes time to establish a company, build the infrastructure and acquire the right talent.
Star Citizen is only in the start of it's fifth year of open development for a AAA title. Most AAA titles take from 5-6 years or more to develop in a closed environment.
While the game is an open development alpha and not feature complete, it is playable. I'm very realistic in that the current live build 2.5 is a very unstable build. Give it the time that a AAA title takes to mature.
It's the most ambitious game title to date with tech that needs to be built to achieve, not a title that a game publisher pushes out before it's ready like No Man's Sky.
Remember him , when you look at the night sky.