No, it means a guy who is walking 3.0 per 9 or so is walking a guy between every third and fifth game. Not as concerning in the 7th. As you said though, a guy who strikes out a lot of hitters can take care of the extra base runners themselves so it isn't as much of a concern. We do take into account everything with relievers. K's, BB's, pitch types, Statcast info, actual vs. expected numbers.