One of the main reasons why this hit is being scrutinized is because Doughty visibly left his feet to hit Foegele, which is an illegal move in the NHL. While Foegele did put himself in a vulnerable position, Doughty's actions were reckless and dangerous, and the league needs to take a closer look at this play.
In a sport as physical as hockey, it's important for players to play hard but also play fair. The NHL must continue to enforce the rules and protect the safety of its players, both on and off the ice.