A spouse, a mortgage, children, student loans -- life quickly throws you all kinds of things that you don't have the option of escaping.
Once you've made the choice to get married and have children, yes, you cannot escape your choice. But life does not "throw" these things at you; you choose them. Some people do not make these choices, and therefore remain free of these constraints forever, regardless of age.
A spouse, a mortgage, children, student loans -- life quickly throws you all kinds of things that you don't have the option of escaping.
Once you've made the choice to get married and have children, yes, you cannot escape your choice. But life does not "throw" these things at you; you choose them. Some people do not make these choices, and therefore remain free of these constraints forever, regardless of age.