Exactly this. What you do on your own land, as an individual, is entirely up to you but as soon as other people are involved then you need to assess the risks appropriately.The problem here is it wasn’t personal risk,
Would I walk over that bridge, Yes
Would I drive a normal quad over, Probably Yes,
Would I expect to take over, or tell someone to take over that bridge 10 persons on or in a Gator and trailer , definitely No !!