It’s really common that you can arrive on a view from different places.

For example on instagram you might click through to a post from the explore page or from someone sending it to you via DM. In either case pressing the back button rendered in the app, or swiping back, will take you back to where you came from. It feels natural and seamless. Although I guess there are other ways to skin that cat than history.back()

But I agree with you when there’s a clear hierarchy. Like on a job ad a “back” button should just be a normal link to the index of job openings.