I think life is really about being happy. Yes, there are some things that aren’t perfect but when you weigh the options of being happy (most of the time) or not feeling anything, what would you choose? And how often does pain translate into good things? It might not be fun while its happening but so often it triggers positive things.
And what would be the purpose of life if there were no emotions? So many things (especially in a frum lifestyle) are based on emotion (Yomim Tovim, Shabbos, Simchas and for c’v the opposite).