There is an unspoken rule in Western society that life begins to degrade rapidly after age 30. Why? Because all of the worse parts of life happen after then. Sagging skin, balding crowns, infertility, middle management. Mediocrity.
In the dating and love realm, the message is clear: You had better figure out life and marry someone by the time you reach 30, or else no one will want you. This rule is applied much more stringently to women than to men (much of this has to do with biology, of course). After all, no one wants to be seen with a cat-loving lonely middle-aged spinster. Older brides (like Meghan Markle) are judged harshly by public, but are judged nonetheless slightly better than single and childless people over 30. In many ways, it is much more socially acceptable to marry and divorce several times than it is to be single after a certain age.