Air traffic controllers take on far too much risk in coordinating takeoffs and landings. I’d let the pilots deal with it. After all, every flight is scheduled to take off and land at certain times, and if every flight took off on time and landed on time the pilots would have an open slot to either take off or land. So, why do we need air traffic controllers to be ultimately responsible for a safe takeoff and landing?
The same is true for a construction project. There is always a schedule, and if everyone stays on schedule, all the work will start and finish exactly per the schedule and everyone will live happily ever after, which in both cases is simply a fairy tale.