Not every mistake teaches a lesson.
If an NFL team takes a quarterback with the first overall pick who doesn't succeed, that does not mean the team should never again take a quarterback with the first overall pick. There is a difference between erring in execution and erring in philosophy.
Tuesday, the Vikings had to own up to a mistake, and it was a mistake of the touching-a-hot-stove variety, one that should find its way into a management binder under a tab reading: "Never do this, ever."
In the midst of a four-game losing streak, the Vikings were forced to release kicker Blair Walsh during the first year of a four-year, $13.7 million contract, an embarrassing development for a generally well-run franchise.
Their mistakes with Walsh came at every level and every turn.
They used a sixth-round draft pick on Walsh. They can justify that by citing Walsh's outstanding rookie season, but they may have been better off taking a raw offensive lineman and developing him into someone who might be helping them today.
They believed that Walsh's shoddy senior year at Georgia was an aberration, believing that special teams coordinator Mike Priefer could fix Walsh's mechanics and turn him into a standout. That worked well enough for a while but not long enough to justify the use of a draft pick on a noncontact player.
They believed that Walsh was worthy of an expensive contract extension, investing further in their original analysis of him and doubling down when they should have considered cutting ties.