Blackjack is one of the easiest games to play in the realm of casino games. Essentially if you can add up to 21 then you can play blackjack.
The strategy available for blackjack is also very simple. Basic strategy is the easiest strategy to use and have such a significant impact on the house edge.
So with both of those considered how is it that blackjack players keep misplaying soft hands?
To put the answer simply, since this is blackjack after all, is that players are misplaying their hands. Specifically soft hands.