i believe the intent was to ensure we didn't trigger the server side warp detection.
but ive spoken with some DBG staff about their server side detection and it is full of false positives anyhow. (my guess is between bard speed, and the teleport-ahead-AAs we all get now a days)
I prefer to use nav for zones with large hills and nonsense like GD - advpath triggers warp detection all the time there - I'll just run my tank ahead, and then do a nav id me.id "come to me" since i leave dynamic updates on, they will keep coming to me until they get there even as i move away