What you say is true. Don't have time to join in, but Britain's colonization was for her enrichment, to the great detriment of India.
to the great detriment of India...as compared to what?
As compared to the perpetually un-industrialized path it was on? As opposed to annexation by some other imperial power?
This sound like the Communist argument that the workers are exploited by the factories instead of sharecropping or some other alternative for unskilled labor.