This is a sort of standard reply that seems very clever but entirely misses the point. Colonialism or any other system of injustice has winners and losers, heck even "perfectly just" systems would have winners and losers. The winners are less motivated to change the system that might create different winners, even if those outcomes are "more just" or "just as fair" or completely arbitrary in the assignment of new winners and losers. This was the basis for a lot of the colonial systems in fact, the British intentionally aligned themselves with minorities in many places to ensure a reliable partner that both profited from the rule and depended on the British to maintain their status.

Is the great Chinese famine relevant to a discussion of colonialism? Not really! The Bengal Famine on the other hand, pretty relevant! It killed a good 10 million people. Look it up!