Because that is my choice? Because life is short enough NOT to waste time? Because my sleep schedule and monetary means allow me to do so?
Pick any one of those, if you so choose, or make another reason on your own.
To address the OP's title: I'm not sure it's a matter of insistance, rather it is a matter of being yourself. Some people choose to do such things, others...might choose otherwise.
To quote Champion Alder from Pokemon White/Black: "You might have a different view than me, but so be it!"