I have to say that this does indeed matter to me as well. I would have loved to kickstart this game. I saw it really early on but was broke when it was being kickstarted cuz of two new babies. I did preorder it before it came out. It's disappointing now to know that it is one achievement which prevents me from completing all the achievements.
It's not a kickstarter problem. It's an achievement thing in general. I fought on TOME's boards for awhile for the same reason. The achievements were uncompletable. For anyone who doesn't know, that is currently the game on steam with the highest number of achievements.