I think that perfectly aligns with their take.

People in their 30s, married, tend to have more stable lives. They are in a position where they feel they are able to give that child a good life.

Peak fertility though is early 20s. By the time people are in their 30s, having trouble getting pregnant is a more common problem.

That actually makes sense. I think I broadly agree with this. Maybe we can do 100 different little things to help people feel like they are "set up".