Ok fair point. Though I’ll say in my experience I don’t see people being weird out by 33/40 or even 33/51 in most cases. It’s almost always with someone in their early 20s and it comes off weird when you know that the brain isn’t even finished developing until years later. I think once someone reaches around 25-30 then they are truly considered “adult” in a more broad social sense.
Common complaint from people is that we send “kids” to war, but obviously most don’t. We just know that’s it’s fucked up to make young people 18- early 20s make life altering decisions.