Actually I had an aunt who was your complexion. In my area there were not alot of light-skinned black people so I thought she was white when I was a little kid. She always made me rub her "creams" on her back. 15 years later I realize that cream was nadinola and she was born as dark as Alec Wec!
I'm def not denying that SOME of the ppl that bleach desire an ALL OVER lighter complection. But, the OP specifically mentioned "why bleach dark spots?".
I would be terrified to use Hydroquinone for YEARS, ALL OVER my body. I spot treat