Making a choice properly requires having knowledge about the particular options. Fertility education particularly in regard to age is not part of the sexual education curriculum in the UK [1] nor in international guidance documents [2,3] (just Ctrl-F "fertility"). And a recent poll in the US showed that 77% of women did not properly understand the relationship between age and fertility [4]. At some point this stops being choices made with appropriate knowledge and starts being a massive and tragic policy failure.
The statement you reference is "77% of women do not know that when a woman is 35+, her age is a better indicator of her fertility than her overall health." As a women in her 30s, I'll say that every damn woman in America has heard of a biological clock by her 20s, and is quite aware, and many are getting calls from Auntie every two weeks about whether she's getting on it yet.
[1] https://www.raconteur.net/healthcare/fertility-education-sch...
[2] https://unesdoc.unesco.org/ark:/48223/pf0000260770
[3] https://apps.who.int/iris/bitstream/handle/10665/70501/WHO_R...
[4] https://modernfertility.com/modern-state-of-fertility-2019/