A funny incident caused by TMAP being unable to suggest illegal left turns

It's a rural road where you could just cross the center line to make an illegal left turn,
but I often see people driving an extra 2-3 km to find a U-turn or circling around just to avoid doing that.
So, I looked at the route in advance and thought, "I'll just break the law once," but there actually are cases where there is truly no straight path available... T_T