What you are feeling is the exact opposite of hubris. It is good that you feel overwhelmed by looking at the universe of possible technologies and the pace of change within them. It sounds to me like you need to make peace with that, and then decide for yourself where you want to build expertise. You can extreme depth, extreme breadth, or something in between. According to IDC, worldwide IT spending is going to be around $2.5trillion this year. Its a big world with tons of products, disciplines, people, and very little of it is totally static. In fact, large swaths of IT probably get very little mention on HN.
To reiterate though, pick your battles, follow your interests/employment possibilities, and make peace with the fact that you can't know everything.