Niknak, for starters I don't always print the TAFs and METARs before I go out. I might check them online or on the telly. So no, I might not have the TAF at the end of my flight anymore.
But it's also very useful to discuss things that happened in the past, where the weather may have played a part. In that case you might not only be interested in the actual weather at the time of the incident/accident, but you might also be interested in the TAFs and other forecasts that were available to the pilot when he (or she) did the flight preparation and made the decision to go. Such as this:
http://www.pprune.org/private-flying...k-hungary.html