Also true! There's a small literature in philosophy that worries about paradoxes in this area. But regardless of how that turns out, it seems safe to say that you shouldn't avoid getting married because of divorce demography, and you further shouldn't think of your marriage's chance of success in purely demographic terms. You instead need to pay attention to features on the ground like how you handle disagreements, your sex life, etc.

Yes and no. The way the rate is calculated is relative, so the people getting married in a given year and divorced in a given year aren't necessarily the same people.