As indicated by the protagonist's name, it's a film about how authenticity are intuitively and morally seen as a mandation for human being. Made in the end of the 20th century, it's a rethinking about how television as a mass medium dominates people's cultural life (it's not even a question anymore in today's mediatised world - EVERYBODY lives IN media, and EVERYBODY is Truman). The show in this case reduces Truman's life value to a symbol, a product for consumption and profits. It's also a call to rethink the positionality of parenthood, embodied by the TV show director - witnessing the whole life of one's child (or more your product) does not naturally mean you know their everything, and they tend to grow apart from the vision one enforces on them, wheither it is for the profit or in the name of love.