It's not that there's anything wrong with them, exactly, it's just that, as a ginger kid, I have eyebrows so blonde that they're practically invisible.
Nice in a kind of editorial way, but NORMAL PEOPLE HAVE EYEBROWS YOU CAN SEE.
When I was dying my hair black, I would just tint them every time I touched up my roots, and maybe use a little eyeliner to reshape them if I felt like they needed it. As a blonde, it seems like it's more difficult to find the right color. A lot of the taupe blonde eyebrow pencils have an orange or yellow undertone, which isn't flattering for my skin tone. I also find that a lot of brow powders and pencils tend to wear off of the actual hairs of my eyebrows as the day goes on, settling onto the skin underneath in a way that looks distinctly odd and unnatural. I could leave them natural, and when I'm feeling lazy I do; however, I find that that makes my face look undefined and my eyes smaller.