Of course there is an art to it as well, since high-precision machining is extremely easy nowadays. It extends the questions about buying tourbillons. Guess we buy tourbillons because we love the art of it. A $300 Chinese watch has a tourbillon, so it is not hard to make. As for gravity, think hairspring tech and regulation are reasonably accurate in 2025 sans tourbillon. We don't need toubillion at all.
