Why are there so few people on the western coast of India (Gujarat and other states)?

Gujarat is similar to Guangdong, China, and is the forefront of India's reform and opening up. However, religious conflicts are fierce, the proportion of Muslims is high, and security in the capital Ahmedabad is not very good. There are many Indian-style wells in this state, which are very beautiful. I plan to visit them on my next trip to India. It is located in the tropics and is affected by the equatorial low-pressure belt. There is a lot of precipitation in the summer. The Indian Peninsula is affected by the uplift of the East and West Ghats on both sides. It is affected by the monsoon circulation. It is surrounded by the sea on three sides and the estuaries of large rivers on both sides. The tropical temperature is high, the evaporation is large, and the water vapor is The content is large and it is easy to form precipitation. Gujarat is the westernmost state in India, bordering Pakistan. It has been famous for its commercial development since ancient times. Earthquakes occur frequently here, the climate is dry in the north and rains more along the southern coast. But it also has a large population, with a total population of 50.6 million, accounting for 5% of India's total population. The area has 23 counties, 226 administrative districts, 18,618 villages and 242 towns. The land area of ??Gujarat is 196,000 square kilometers, accounting for 6.19% of India's total area.