If you ignore the distance to the runway 250/10,000 does not reduce high energy approaches. 250 kts below 10,000, at 5 nm to go, is too much energy. 250 kts below 10,000 at 50 nm to go, is an easily managed amount of energy.
It's a three headed monster - speed, distance to go, and altitude. The various combinations provide a low, good, or high energy state.