I don't know if sati/sutee was that widespread. Vedas don't even mention it, and epics such as Mahabharata there are thousands of accounts of deaths of men... and only 1 time there is the sutee account.
If it was a required/widespread custom, then there would be accounts of sati all over the scriptures(Hindu scriptures are extremely war-like and the accounts of deaths and destruction are recorded like action movies).
Not surprising the West could not understand a woman so devoted to her husband that she prefers death - literal and symbolic - to life without her husband.