Lacking civic virtue costs a person identity, not just effort.

Evidence

But that image may make civility seem less natural and more demanding than it actually is. It misses out on the fact that civility involves, not just internalizing values, but also identifying with the groups whose interests are associated with those values (Kelman 1958). And so it fails to register the fact that without civility a person may be deprived of dimensions of identity that are attractive and even compelling. It marks the efforts of self-denial that are required for the achievement of civility, but it does not mark the costs to the identity of the self that are involved in failing to achieve it. — Philip Pettit, Republicanism, 1155