Yes, I would agree that 2007 being the best year ever for gaming is utter crap. However, for what it's worth, there are a lot of games that were not on your list...
MotorStorm
God of War II
Guitar Hero II
Guitar Hero III
Pokémon Diamond and Pearl
Blue Dragon
Heavenly Sword
Eternal Sonata
Halo 3
Portal (and Team Fortress 2?)
The Witcher
Call of Duty 4: Modern Warfare
Lego Star Wars: The Complete Saga
Super Mario Galaxy
Crysis

I would say that people argue for it being the best year ever are probably thinking mostly of BioShock, Assassin's Creed, Uncharted: Drake's Fortune, Super Mario Galaxy, Mass Effect, CoD4, Portal, God of War II, Crysis and Halo 3.

It was certainly one of the best if not the best year for gaming in this generation of consoles.