Simply to provide some context, the 2017-2019 average yearly deaths from motor vehicle accidents in LA County is 836.7 (for some other numbers, 2.5K from accidental injuries and 852 from suicide). I touched on this earlier in the thread, but in general as a society we have seemingly determined that we are willing to deal with 837 motor vehicle fatalities a year in that county in exchange for the benefits it provides (if it were, say, 83,700 fatalities, we'd certainly start getting "ban the automobile!" protests). I certainly don't know, nor does anyone really agree, what that threshold should be for theme parks. Is it one? Is it one hundred? Do we save 432 deaths by closing the parks forever but also increase suicides by 232?
These are incredibly hard, complex decisions that have no easy answer.