I'm actually relieved to see someone like me,
yes, I zone out a lot as well and its usually just muscle memory and a boost of concentration taking over your fingers, since you are playing subconsciously. it actually helps me get good scores on endurance maps (where I daydream/zone out the most)
THIS IS NOT A GOOD STRAT THOUGH, it can be a huge setback when playing higher level endurance maps which require full focus. It also decreases progress since you aren't dedicating all of your brainpower to your gameplay. I wouldn't even consider it a strat because I can't control when I zone out. Usually , zoning out is only good for moderate or easy maps in your skill level (from personal experience)
tl;dr you are not weird i do it too, just don't over-use it