Because you’re an edge case that they don’t care about. For almost everyone else (as you can tell from this thread) the battery life on the Apple Watch is just fine - we just don’t care about having it last a week - and so they’ve no incentive to make it last a week.

I’d love it to be thinner, I’d love it to have an under-display camera for FaceTime, I’d love it to be cheaper, I’d love it to be faster, and yes, I’d love more battery but really I go to bed and have 60% left most every day and it’s fully charged when I get up so I just don’t care about the battery in my day to day life.

I do. Have one face for work hours which includes time zones I’m interested in for work colleagues, one for evenings which hides any appointments and all that sort of thing, and another one for weekends which is just a fun one.