The Falcons moved into the 1970s as one of the worst teams in the NFL, having gone a combined 12-43-1 over their first four years in the league. Everyone associated with the franchise hoped the 1970s would be better, and they were. Just not much better until late in the decade.
The draft was once again an opportunity for the Falcons to improve their football team, and just as they did in the 1960s, they mixed some terrific picks with a lot of useless picks. If you were going to break down how many picks the Falcons made in the 1970s and how many worked out, it would be something like 10-25% of their picks, depending on how loose your standards for success were.