Another way to get an intuition for it is the prevalence of various conveniencies of life. For example, I believe about two thirds of households in the world have refrigerators. About 12% of the world's households have cars. These and many other material benefits are possessed by regular people today but would have been out of reach 400 years ago to any member of the European nobility or, as Adam Smith puts it, "...an African king, the master of the lives and liberties of ten thousand naked savages.". (In his time, Smith was commenting on how remarkable it was that an English workman could have pots and pans made of metal and a window made of glass.)
But all these things were invented after colonialism of most colonial countries.
And they are prevalent in uncolonized countries in roughly the same ratios as colonized countries. Arguably the uncolonized (China being the main one) have more than the colonized (India being the main one)
It is not strictly correct to say China was uncolonized. I suppose parts of it were not.
Global trade has, indeed, brought everything everywhere; but the present operation of global trade -- the norms used, the international bodies involved, even the weights and measures -- are all the result of power projection by western, colonial powers and prudent adaptation by other countries. Even China's legal system is an adaptation of a western legal system (the civil law). The prevalence of certain institutions is something we take for granted today but does have its roots in colonialism.
While civil institutions were spread to colonies by colonialism, they were adopted by uncolonized countries also. Countries can adopt beneficial things without being taken over and having their resources and wealth extracted.
The same way Americans adopted civil rights from countries which had them earlier on. Europeans who banned slavery earlier than Americans did not need to invade America and extract its resources to bring them out of being a slave-owning polity.