In my mind, things like comments in code and context in JIRA tickets (what we’ll deliver; how we know it has been delivered) are more than administrivia: they help orient a reader’s attention.
When I think about this topic, I recall a quote from someone much smarter than me:
In an information-rich world, the wealth of information means a dearth of something else: a scarcity of whatever it is that information consumes. What information consumes is rather obvious: it consumes the attention of its recipients. Hence a wealth of information creates a poverty of attention and a need to allocate that attention efficiently among the overabundance of information sources that might consume it.
Writing can potentially direct attention. Doing so is economical for everyone.