Nope! Nodes are vital to bitcoin's decentralization ā but not every user needs to run one to use Lightning.
nostr:npub17248hqdkw8j83gq383pu75fa4p42cfaf76dp5u3yec6lrtnej8asf65tfn will be speaking about the latest developments in Greenlight by nostr:npub1jugar2agq6369p0l86razavs9shj2p6pscxecevs8j94ap37hkqsjlfc28 that will allow self-custody Lightning to scale to more users without running hardware.