I guess my question is how you'd have them change things, because it sounds like you're saying, "Hurry up and marry just anybody," and, "Hurry up and make more money more faster." I think that's falling into the common trap of blaming young people for having been raised wrong. If the choices are ones they don't know they're making, maybe it's the case that no one's explaining the consequences to them.
Which is not to say there aren't people who are unneccesarily hesitant to marry, and also not to say there aren't people who value having a new car over bringing a new life into the world. But not everyone who's without children is that kind of person.
I'm sad for them. That's the underlying suggestion from "decisions
they don't know they are making." Our culture has told them to prioritize things other than marriage and family, and so they have. (Not, HURRY UP AND MARRY JUST ANYONE! But make it a priority to find someone with which to build a life together. (Oh, and emphasize the "TOGETHER" part.) Not "HURRY UP AND MAKE MORE MONEY!" but make choices that prioritize family and realize you can sacrifice other things that aren't as important as family.)
It's similar to the situation with Student Loans. I'm not blaming (solely) students for running up college debt. Picking useless degrees, yes, but the debt is a result of a propaganda campaign that "COLLEGE IS THE ONLY WAY FOR YOU TO SUCCEED!!!" and public schools that don't offer any options other than college prep and a pushing of ever more marginal students to college.
We've been telling our young people lies for 40+ years and we are seeing the results. I don't blame the young people for what they have been taught. I'm saddened by the consequences they will have to face.