I’m not a fan of freeform because like you say there is no structure and no element of chance. The point of the dice and character sheets systems is that your stats bias the chance of one outcome or another but it’s never actually, truly guaranteed. David can always beat Goliath, and will from time to time. Freeform just doesn’t allow for that, and people can only lose when they choose to, since imposing it is “godmodding.”