The current Automation systems are developed by MNCs such as ABB or Schneider which are highly upmarket products (in their build, finish and positioning), you could argue that India is not the primary market they’re aiming to serve, so any such product you procure will most likely have been imported.
The organizations that make these have massive overheads/R&D departments that need to function for these materials to be developed and refined over time. After all, you don’t question why bottled water costs 1000X of what it should cost, or why any FMCG product costs 25X of what it should.
Thirdly, home automation systems are still a nascent field in India and there are several Indian firms which are aspiring to make much more affordable products keeping in mind the spending habits of the Indian buyer segment. Give it a few years and you’ll see Home Automation products across all price categories and segments.