Let's say you were driving at night with someone in the country, and because they either knew the road or could see farther ahead they said, "There's a boulder in a road ahead, we're likely going to hit it if you don't slow down and turn to avoid it."
And you do slow down and it allows you to turn to avoid a crash. How do you respond? Mock them for always being wrong about predicting a crash?
People mistake warnings about possible recessions, which have a probability attached, with forecasting an inevitable doomsday recession. There's no credit given to economists for the recessions or depressions avoided.
Often the warnings are about the risk of a recession with no intervention, and in an overwhelming majority of cases there is some action taken in fiscal and monetary policy to soften the blow or avoid the worst outcomes.