You blame the problems with a design on the users. Were you in private industry producing a product, you would make a luscious target for a lawsuit. The job of the designer is to PREVENT problems and minimize the risks. Fixed rail transit systems have been around for a hundred years. The design requirements are well understood. So if it isn't done correctly, blame the designers. Unfortunately for fixed rail as a transportation mode, if there are problems with a fixed rail design, they are hideously expensive to reverse because of their size and cost, indicating yet another inherent flaw with the transit system you advocate.
One of the inherent risks in fixed rail transport systems is the enormous mass of the vehicles, which demands careful design to prevent collissions. Of course, that is more expensive AND disruptive to other modes of surface transportation. That latter problem was clearly illustrated in the discussion of how Houston had to shut the system down during the Superbowl, indicating yet another cost of fixed rail systems you have yet to confront (and carefully chose to ignore in your response). Note also the risks associated with single point failure, the power outages, when the system comes to a total halt. Automobiles, or buses for that matter, have their accidents and breakdowns too, but because it is a multipath system are capable of being re-routed around the problem. Yet another reason buses and jitneys are a better mass transit solution than fixed rail. Buses are vastly cheaper to buy, more reliable, more flexible, and employ more people, BUT they too have a single point failure mode, union work stoppages.
How come Houston has so many idiots on the roads?
The designers of the system knew that there were idiots on the roads before they built the system. The job of the designer is to account for stupidity because it is a factor in any mode of transportation. Fixed rail carries inherent risks that do even more to prove that they are not worth their outrageous costs. Buses are a far better solution.
There is NO SUCH THING as an idiot-proof design.
Hang the lawyers.