I'd say luck will sometimes make you rich, and being good at what you do will sometimes make you rich. Being good at what you do and also lucky has more of a chance of making you rich
It's *usually not entirely luck, you generally have to sort of know what you're doing
To be completely fair, a layer builds up in the pipe which stops the lead being an issue unless you royally fuck up like Flint. That said, it still should've been fixed