Well, that was before famous Industrial Revolution in UK! It wasn't that British raped India of its precious resources but mass industrialization that led to fall of handicraft.
I will agree with the Industrial revolution part, but rest is not entirely correct. I will give you a small example.
One of the major developments of the Industrial revolution in England was the textile industries in Manchester.
The raw material, cotton, used to go their from India. The British did everything possible to ensure that India remains as a cotton supplier only. They destroyed the
Dhakai-Muslin cloth industry, for it was a competition. They did not even let the Indian merchant vessels enter their harbour.
Indigo, the natural dye used for whitening cotton cloth was forcibly produced in India, primarily in Bengal. In fact the British did not even let the farmers to grow other crops, which led to multiple famines.
When Jamshedji Tata was setting up Iron & Steel industry in India, the Chief Commissioner for Indian Railways, Frederick Upcott had famously said that he will eat every pound of steel rail they succeed in making. You can very well understand how much support the Indian industries had.
Just 2-3 examples....
India INTERVENED after millions of East Pakistanis started pouring into its territory as MIGRANTS to seek refuge from brutal crackdown of PA. Also, India could annex East Pakistan after the unconditional surrender of PA, but let East Pakistan remain independent as Bangladesh.
Interesting observation, one of my friends is getting married, he is from West Bengal. So there are lots of proposals from families of prospective brides, following the traditions. I went through them and I was literally surprised to see, so many, so many of them had mentioned 'East Bengal', or 'Bangladesh' as ancestral origin, every other one.
Knowing something is one thing, realizing that fully is completely another. That day, I realized there were so many people who migrated to West Bengal only. There are other states like Assam and Tripura too.