Just so you know, salaries in Bangalore are comparable to that of SF if adjusted for Purchasing Power Parity. If you don't believe me, feel free to look up levels.fyi for both and match the conversions through: http://salaryconverter.nigelb.me/
That's because SV outsources their development work there, artificially inflating prices. In reality, India has a 'tech industry' in the same sense that Africa has an 'AI industry' - there is industry and it is vaguely related to AI, but tagging images does not an 'AI industry' make.
If there is development work happening, then there is a tech industry. Perhaps you may consider a tech industry to only exist if it is spawning a million startups a day but that is not a view shared by the rest of the world. See: http://elitebusinessmagazine.co.uk/global/item/how-the-tech-...
