I don't really get the point of this. I had much longer hair and a full beard when I got my driver's license. I look vastly different now. Every now and again,

I don't really get the point of this. I had much longer hair and a full beard when I got my driver's license. I look vastly different now. Every now and again, a TSA agent will casually comment that I don't look anything like my ID photo. They still let me through. Since I was in the active duty military for a long time and able to renew my license from out of state without ever having to go the DMV, before getting my current license, I was as old as 38 using a license with a picture of me taken when I was 23. They still let me through every time. What is the point of a matching process when failure to match doesn't result in you not being let through?