This is generally due to a lack of seasoning or an abudnace of depth. Most of us are familiar with this and while some have suggested that the Packers first-round pick. Rashan Gary, needs a redshirt year in 2019, I disagree.
Gary isn't going to play 70 some percent of the snaps like Clay Matthews did a year ago. But I could absolutely see him getting in on 30-50 percent of the snaps next season and even in that limited role, Gary can make an impact.
In fact, with Gary, less could be more. A lot more.