The Brits are the only empire in history to end chattel slavery. You are conflating multiple time periods and then acting like you are smart. The debt slavery of whites was in the 1500 and 1600s. The chattel slavery of non-whites was from the 1600-1800s. And, in the 1800s, they had banned slavery in their entire empire, which was actively a point of contention during the US Civil War. I can do a lot of things with historical narrative if I want to pretend away 300 years of change in that country. Did you know that Japan is run by a shogun and that they behead all foreigners that visit anywhere but one single port?