The fact that God knows the number of hairs on your head is not necessarily that big of a deal (Matthew 10:30). Given enough time, I could know the number of hairs on your head—at any given moment. All you’d have to do is be still long enough for me to count them.
But what is amazing about God knowing the number of hairs on your head is that the number is constantly changing (sorry to bring that up), and God is able to keep up with it!
Since Adam and Eve first opened their eyes life has been changing. And with each generation change is becoming more pervasive and is accelerating.
If you are not willing to embrace change you’d best move to a museum or a graveyard—those are about the only two options where change is not the norm.