Not necessarily.
The other day I started a fire using both a vasaline cotton ball, and fatwood in front of my dad. Just from watching me my dad, whose never touched or seen a firesteel in his life, was able to start a fire using both methods on his first try, with less than a handful of strokes. Vasaline cotton balls and fatwood, are practically idiot proof, and will never break, freeze, or leak. Now it does take skill to start a fire with regular wood, but not much more, and it can be done, if you happen to lose your fatwood and cotton balls.
Of course, lighters are easier, slightly faster, and one handed, but they can fail, and if they do, a firesteel will always work. It's not that firesteels are in some way better than a bic or zippo, it's just that they are a guaranteed backup in case your ideal tool doesn't work or isn't available.