You do when you get married! You do when you join a shuttle mission to space!
Obligations mean that your choices are important, crucial because your life is important. Freedom to do whatever you want, whenever you want, however you want (as long as you do not take away someone else’s freedoms) suggests that your choices are not ultimately important- whatever you choose is fine, it’s all the same.
Obligations ultimately connote that you live a meaningful life!
Menachem Mendel Bluming and RMF