I think there are advantages, but do they outweigh the harm is more important?
India wasn't a single country and had 100+ languages and many different writing systems. Colonisation created a country (that split after independence) where you needed to speak English in order to work in something like the civil service.
Today India has many call centres because they have so many English speakers and Indians often use English to speak to each other when they don't have a common Asian language.
Was it worth it? It's really difficult to quantify.
Colonisation meant many people form former colonies could come to Britain after WWII, was that a gain to those countries? They lost a lot of mainly young people but those young people were often sending money back to families.
Britain encouraged Indian doctors to emigrate to the UK, who benefits most? THe UK got trained doctors, but those doctors were (and probably still are) educated to a similar standard to UK based doctors. The healthcare infrastructure was set up under colonial rule.
Some things were interdependent, Lancashire became 'King Cotton' during the industrial revolution, that cotton came from America and Asia but was processed in Lancashire due to the damp environment.
I feel I'm waffling and just putting thoughts down but it is a really interesting question that would probably need a PhD thesis to explore fully.