Under any circumstances, a great season by an NFL team requires that a lot of things go right, and a big part of that is always having key players stay healthy. Rare is it that any team can lose more than a couple of significant players due to injury in the middle of the season and still come out on top, especially if one of those players is your quarterback.
The Pittsburgh Steelers have a Super Bowl-caliber level of talent and pedigree on their roster in 2020, but if they are going to win the Super Bowl, they still have to have a lot of things go right.