Important background the article doesn’t mention: British policy in India had always (since the East India Company) days been about deindustrialization. It’s not just about vague conservatism or even not bothering; turning India into a manufacturing hub like Adams wanted would’ve stood again everything the British Raj stood for. From here I’m speculating, but arguably this consequences of this policy (in place for generations by this point) meant there was no infrastructure for adopting this invention.