What will change because of it?

You can learn from your mistakes and make the necessary changes, but that is only if you admit that you made a mistake. You can learn from other people's mistakes rather than having to make the same mistakes, but that is only possible if you take the time to notice.  By the time you get old you have learned a lot of mistakes that you can avoid repeating. You want to warn those younger than you by telling them what you have learned to keep them from making the same mistakes. Unfortunately they don't want to listen. It's hard to watch them make a mistake that you tried to prevent. I know they don't want to hear I TOLD YOU SO. I have learned to simply say, I am sorry I was afraid that could happen. Sometimes I wander what is the point of all the knowledge you accumulated over your lifetime if no one will listen to benefit from it? In these fast paced times we live in, no one makes the time for "small talk" which is when random stories and details emerge that you can learn from. Through many decades of "small talk" I am able to recall and share past experiences that could help someone. But unfortunately they were so busy running around like a chicken with their head cut off that I never got to warn them. Not everything you need to know in life can be found on Google.