Because 99 out of 100 folks who try to do more than one thing fail.
Focus helps startups concentrate their efforts and resources on doing one thing well. Even if that does not work, because of the focus and attention, they are able to smell the failure earlier, and can then plan the pivot and refocus.
If you do more than one thing, your resources and bandwidth is shared. Your efforts do not carry the same weight that a focused effort can. And, in the midst of the chaos you tend to ignore (or miss) the signals that things are not going as you intended them to.
(For those who do not know the relevance of this picture (below) in this post, click here to read the story of Arjun and the fish eye).
This article was originally published on my blog –The Hub for Startups.