-super fast people cant do things before others can think, admit it they have to think just to get moving themselves and then think again to throw a single punch or whatever
Superfast people like Flash, Superman, etc. CAN do things before others can react, because they can accelerate their own brains. Thats why these kind of characters can see the world frozen meanwhile they can move like they normaly do.
1.- A lot of people don't realize or they can't measure how important and overpowered is the power of speed.
Seriously, Superman by example. First than nothing, a hit by Superman would break the barrier of sound, but who cares about the sound, because just one hit would be like a hundred or thousands of atomics bombs just because of the speed of the punch... now imagine beign hit for something like that before you can react like a thousand times in just one second or less.
Fortunate, comics does't stick so hard to science.