It’s true that progressives argue that the Constitution is a living document, whose interpretation has to evolve with the times. However, if the Constitution uses a phrase such as “natural born citizen”, it’s useful to understand what the drafters had in mind when they used that term. It’s not likely they were talking about Cesarean deliveries, or in vitro fertilizations. As Macmanamon suggests, from Madison’s perspective (and he was one of the primary drafters), it meant “born here”.
Moreover, and with all due respect, the “it seems to me” analysis doesn’t go very far when the Supreme Court is involved.