Sacrificing long-term happiness for the short-term is one great weaknesses we humans possess. It's something I'm trying to unlearn. Anyone who wants to get ahead in life has to learn to bear inconveniences in the now to succeed in the future. It's a major key to achieving success in life.
Don't you find it interesting that we know that delayed gratification is a benefit, and instant is a detriment to our wellbeing, but we indoctrinate kids with instant?