It makes perfect sense. You don't have to directly compete in the same position for your minutes to be affected by another player. You're making the assumption that there is only 1 lineup style, that everything is like for like. But you could have a lineup with 4 guards and 1 big where Evina is one of the 4 guards or you can have 2 bigs line up where Evina is replaced by Edwards or Ono. Either of those lineups could have Makurat with or without Evina, but there would be far fewer minutes of either instances of those lineups without Evina.
For example, minus Westbrook, a player like Ducharme could play an extra 10 minutes that would otherwise go to Westbrook. Say a lineup like Paige-Azzi-Westbrook-Edwards-ONO could turn into Paige-Azzi-Ducharme-Edwards-ONO. Now Ducharme is competing for 10 minutes with Makurat that she otherwise wouldn't have competed with Makurat for.