<Snipped quote by Darlit Glitch>
Oh? How so?
Since you can't always count on having a bunch of power to draw from, most magic uses precision to achieve it's results, instead of brute force.
Let's say he uses magic to turn off the lights, he can do it in a few ways.
*starts counting out on fingers.*
One. He can compress the air above or below the switch and release it in a focused burst to move it.
Two. Mess with the gravitational effects on the switch to make it move.
Three. Bend space to make it closer.
And so on.
But all of these require at lease a decent amount of power to achieve, and oftentimes magic users are targeted right after they're done with giant spells. So if he get's attacked after a huge experiment the next day, he's not likely to have much energy left, and the energy that he used to turn off that light could deflect a bullet or create a distraction, giving him time to live and recover.
It's the reason why most of the careless magic users are dead, because they aren't prepared for such situations, making them powerless and physically unable to protect themselves.
