This is true, but there's a big difference between saying "15-20 hours battery life, which is 11000 5-seconds activations, which last you a few years with 10 5-seconds activation a day" and "years of battery (btw in small text the real number is given). Especially since they mention that this project is hackable/you can do other things with it, knowing in advance you have something like ~100k button presses means some projects feel perfectly and some others won't really work.