Going to the bathroom is rarely a defining characteristic of a person. A persons job or career, however, is a large part of their identity.
By what they do and the motivation to do it (teachers, nurses, doctors that see it as a calling, versus those that see it as a job). By constraining their lives (same examples, nurses with 12 hour shifts 3 days a week, severely constrained and stressed, but then 4 days to decompress gives them some greater freedom to pursue other interests than a typical 9-to-5 employee, but the stress may be too much anyways). By defining who they're in contact with (constant contact with coworkers, do they become friends, enemies, merely people you work with). By defining how much time you can spend on holidays (1 week, 2 weeks, a month?), which determines what you can do with leisure time. Income levels, again defining what you can do with leisure time, or at least constraining it if income is too low.
Unless someone's going to the bathroom frequently or painfully due to a medical condition (IBS, kidney stones, bladder infection, etc.), they likely aren't finding their lives terribly constrained or defined by that element of their existence. So in a drama it has little value, perhaps more in a comedy depending on the sort of humor they're going for (see Family Guy).
By what they do and the motivation to do it (teachers, nurses, doctors that see it as a calling, versus those that see it as a job). By constraining their lives (same examples, nurses with 12 hour shifts 3 days a week, severely constrained and stressed, but then 4 days to decompress gives them some greater freedom to pursue other interests than a typical 9-to-5 employee, but the stress may be too much anyways). By defining who they're in contact with (constant contact with coworkers, do they become friends, enemies, merely people you work with). By defining how much time you can spend on holidays (1 week, 2 weeks, a month?), which determines what you can do with leisure time. Income levels, again defining what you can do with leisure time, or at least constraining it if income is too low.
Unless someone's going to the bathroom frequently or painfully due to a medical condition (IBS, kidney stones, bladder infection, etc.), they likely aren't finding their lives terribly constrained or defined by that element of their existence. So in a drama it has little value, perhaps more in a comedy depending on the sort of humor they're going for (see Family Guy).