>Rightoid weebs try to relate to shippuden and fail utterly at understanding it (like with Tanya the Evil)
Itachi is whirling in his anime grave right now.
Seriously how do you misunderstand a quote this badly? (Not to mention the context* of the situation in general). Itachi is literally the embodiment of "sacrifice yourself for the greater good". Moreover, the main hero of the series, NARUTO, is all about the pain of loneliness and the need to rely on and fight for others as well as yourself. It's a more nuanced 'we live in a society'. Itachi was differentiating this idea from the obsession that Kabuto had.
*They live in a semi-feudal world with military-dictatorships and super-human warriors with various elemental and energy-based attacks on top of insane physical stats, societies constantly at war and subsequently having child-soldiers (LIKE ITACHI) having to sacrifice themselves for a greater good, sometimes unnecessarily. Comparing this society and it's values directly to people today is like trying to compare feudal Japan with modern Japan.
Moreover Itachi is saying this while fighting Kabuto, an orphaned boy become medic, spy and scientist whose idol was Orochimaru and his own lack of identity and trauma lead him to essentially BE Orochimaru, whilst ignoring himself and not actually having any real connections outside of a delusional idea of "genetic relation"/abilities.