It doesn't seem like they ignore it. Sailors might be a decent analogue for astronauts while isolated within a space vessel, but that's not what this experiment is. NASA wants to research the environment while on a Martian surface mission, including doing stuff like suiting up in spacesuits to go do work outside, deal with communication delays, and having research responsibilities.

It's somewhat similar to being confined on a sailing ship, but is still different, and the minute details really matter for something like this.