They just did not let 7GB right now because no developer needs that much now so they can release more RAM in future if there is a need and when the system is matured the OS and everything will be optimized to release more RAM. Also sony intendeds to a lot of multi task here and they wish one second resume from suspend of PS4 which is possible only if we store all the content opened in RAM which is like Sleep in PC's.
In a year or two more RAM will be available for developers when they need right now they don't need 7GB so sony wanted to be future proof for now.
GAMING is not about spending hours to pass/waste our time just for fun,
its a Feeling/Experience about a VIRTUAL WORLD we can never be in real, and realizing some of our dreams (also creating new ones).
So, Feel Emotions, Experience Adventure/Action, Challenge Game, Solve puzzles and Have fun.
PlayStation is about all-round "New experiences" using new IP's to provide great diversity for everyone.
Xbox is always about Online and Shooting.
Nintendo is always about Fun games and milking IP's.
