I wonder how people can claim that a game is great without playing it
Just thanks to a you tube nice looking demo ?

There are apalling boring games around with a great demos

The goal is to make games rather than coding ?
With poor coding you can make a great virtual reality project you dont make a great game

The game engine task is to relieve the game programmer from reinventing the wheel, that's it

There is no great game with a poor coding
But there are great games with a poor graphics