I like to think of it in terms of driving on the highway.
There are times when you are cruising along and a big truck blocks your path, so you floor the accelerator and pass him, then come back toa reasonable speed. But If you drove on the road with your pedal to the floor constantly you would :
1. Get arrested
2. Kill yourself
3. Kill someone else
4. Lose control of your vehicle.
The same should aplly to playing fast , use it when you need it , to accomplish something. If you overuse it , you'll get into trouble
