I've noticed similar things with off-road biking as well. Hydrocut generally does an okay job of snapping to the trails there since Google knows about them, but I was at Rondeau this weekend, and Google kept insisting I was on the adjacent Lakeshore Rd rather than the Harrison trail [1] that I was actually on. And this had real consequences because my youngest and I had become separated from the rest of our group and were trying to use a "share my location" through Signal, but the Android system-supplied location used was the one that had been unhelpfully snapped to the road.

[1]: https://www.alltrails.com/trail/canada/ontario/harrison-trai...

The other reason someone might want a screenshot specifically isn't to share a location, but to share a route. For instance, I might want to text a friend a screenshot of my driving route. Maps can sometimes route weirdly, so this is definitely a use-case I've needed before.