This expression is not about physical location, but about being in a different life situation.

Figurative Use

Implies that a situation may seem more desirable from a distance, which may not be the case up close.

Grass Is Greener

Can reflect the idea that different cultures or lifestyles are envied or idealized.

Used when people have opposite viewpoints or support different sides in an argument.

Indicates the physical or metaphorical 'side' one supports in a debate.

Suggests that despite differing views, mutual respect is possible between parties.