I think it varies, yes. People have smaller bladders, some have larger. It also depends on how reactive you are to the sensation of a full bladder, and how risk averse you are to having it full -- perhaps you have had bladder issues, infections, etc. in the past and are mandating a self policy of frequent urination. But it's just a reference range, and if you ever took a blood test, you realize they might not matter some times.

I feel like bowel issues are worse though, since you delinated them. You never ate something that went down wrong? The worst experience I ever had was eating shrimp that caused food poisioning. I practically lived on the toilet, and I think my understanding of what IBS from having a family member who has is gives me a perspective that only offers sympathy rather than criticism unlike other posters. I don't blame people from being doubtful that perhaps the lady in questions self diagnosed as IBS and didn't get a doctors note because it was balogne, but the invasion of medical privacy and heavy handed get-the-note or be-fired dialoge tree the manager has seems fucking bonkers. I suspect it's just an excuse to fire a system designated target -- as amazon does and they just quipped up a reason to fire her.

> i object to those methods but not the concept of appropriate thresholds

What's the difference? Why does Amazon have the right to direct observation of their work and bathroom breaks, but your employers/clients don't have the right to direct observation of your work and bathroom breaks?

> if a task does not require specialized skills i will call it menial.

"Specialized" in that context is meaningless. Skills are skills -- there is no job in any modern economy that doesn't require training, whether it's through education, provided by the employer, or picked up through practice doing the work. It would take you years to achieve the productivity of harvesting food[1] compared to those who are skilled at the job, and vice versa.

If you're in IT, the worker shortage that provides you with higher wages is not based on your merit, it's based on market conditions totally out of your control. There are people who have more education/experience, who have invested more time and effort in their field, earn less money, and yet make more substantial contributions to the economy than you do. So I don't think it's wise for anyone to start calling jobs "menial." It's a cultural practice designed to justify worker exploitation.

[1] https://youtu.be/OTCqyfJwkx0?t=422