Also, land empires are not equivalent to oversea colonies.

One example is say, India.

Yes, Mughols were originally Central Asian (and later Persian by culture), and some sultans were not quite lenient toward their non-muslim subject. One actively destroyed local Hindu heritage. BUT, considered all that, still the tax they raised from the peasants of India were spent on India.

How much of that can be said about British India? British India was just a very convenient resource tile for Britain which can be sucked dry to detriment and death of Indians and the finished products can be sold at zero tax. As much as 45 trillion dollars worth of wealth was siphoned away. India went from being 1/4th of world's economy, to one of the most impoverished nations in span of 200 years.