Lanefan
Victoria Rules
I don't think it's nearly as cut and dried as you're making it out to be.Not really. If the group automatically defaults to mechanical systems if those mechanical systems exist, then it's hardly a group that is intent on freeform play.
All our lives and in every facet of life we're told that if there's a rule (or law) for something then we're expected to obey it; and this sinks in.
And so, often the only time people feel free to not follow rules is when there are no rules to follow. As soon as any rules appear then that lifetime of training kicks in and people (usually) start to follow those rules, whether they in fact want to or not.