That's because there's a third choice: neither good nor bad. Maxing out a CPU is not inherently good or bad. In practice, it will be considered bad if the consequences (eg a game is not suitably responsive, mission critical data gets lost, power consumption increases, heat output increases, etc) are unwanted, damaging, or undesirable. In some applications, it is possible to cope with or eliminate a maxed out CPU (eg reducing resolution of graphic refreshes) without unwanted consequences.
Originally Posted by Bubba
Similarly, an unloaded CPU is not necessarily good or bad. For example, if a computer system powers down an inactive processor, then there can be a later power spike (and impact on the electronics lives) when it is subsequently powered up. If that is deemed bad ....