I disagree that BV determines difficulty. If we were to do so, how are we ever going to compare men's difficulty?
These days, most men do 4T(or 4T+3T), 3A, and solo triple jump(+3T if combo wasn't used) in their SP.
If you look at in this situation, difficulty must be based on GOE because the base value would be similar in most men, and there would be no way to compare them.
Hence why they should try to earn as much GOEs as possible, and that means more effortless skating, more interesting entries and exits, more movements, more transitions, and etc.
Effortless and beautifully executed program should be more difficult because it requires more than just "jumping."