Coaching Decisions - Special Teams

The kickoffs Grupe had put in play started around the 20 yard line but kicking it into the end zone gave them an additional 10 yards and didn't run any time off the clock.

Add to the fact that you have Orji and Gray who are ranked as two of the top ST tacklers in the NFL and I came away scratching my head about the decision making process of the coaches.

Why would the team that avoids touchbacks by kicking to returners suddenly kick it in to the end zone and not run off any clock?