to answer sometimes in different areas of country we don't get a constant high count like it seems folks do near coastal areas. I say this based upon posts from those with gps lock problems like I used to have . (not so level areas).
If you have trouble getting 6 or 7 at your location, then knowing that at 5pm to 7 pm the sat population with be higher with maybe 9 or 10 showing than the 6 at 2 pm. Maybe I will fly at 6 that day, makes sense to me.
If you do NOT have an issue with gps lock that is valid question but many do so the more you know the more you know.... and then I say O wow