It can be, if you're talking in the extremely broad, SimCity sense. But it's more common to talk about only one industry (phone industry, tech industry, food industry, etc.), in which case "the industry" works fine.
I think the [brackets] meant they were trying to point out the TTS pronunciation. I guess it was pronouncing it as if it was written "industrien" instead of "industrin". I can't listen to it right now to see if it's been improved since the new TTS came out though.
That's right. It should be pronounced industrin. It actually sounded good to me now both in the slow and the normal version, so I think this was probably a problem with the old TTS where the new one is OK.