Dunno who told you that but it’s not true. Also, it’s not as tho most of these ppl will prob never get married, if someone gets married later there’s nothing wrong with that at all in Islam, unfortunately in our culture (esp ‘back home’) a lot of ppl tend to twist things and make these free choices we have into something altogether much more rigid..
Each to their own, if some girls want to get married earlier good for them but it’s wrong to make out those who choose not to are going to be questioned by Allah about it. Islamically speaking marriage is recommended obviously but not even obligatory and being single past a certain age hasn’t been made haram **or even makrooh **(disliked). If it was such a big deal for girls to be married by a certain age surely there would be set rules for it (think how many thousands of other things are strictly regulated by Islam)..