Could you calculate total voting power used per day, followed by how much voting power is used by bidbots, then average that over a 7 day window? That will give you an accurate sense of how bidbots are actually influencing the overall ecosystem.
Your current calculations are akin to the people jumping for joy at 1 Million accounts, but actual usage has hovered around 60k a day and 150k a month, far fewer than the number of accounts.