I have seconds in my status bar. It isn't distracting at all. My brain filters it out just the same when I'm focused on other stuff open on my computer
Eh, it's not that bad. i3 does it every five seconds by default, along with other status information, but to me that bar is small enough to not draw my attention if I don't need it. Actually I even often miss when it changes the color of some text to notify me of a critical situation, eg available memory dropping below 500mb.