This did exist. People did parks (all over the country) without FP of any sort back in the 70s. Still do go without FP of any sort in some parks. Lines were LONG, everyone was in 1 line, vs 2. That's why Disney (and others) started to come up with something to split the crowds, with some using FP and some using stand by. What they could do is tweak their ratios so more stand by get in per hour, and drop some FP from the numbers issued. Yeah, I know that would reduce the odds of getting some FP but if would also shorten some wait times for stand by, so maybe win-win?