Why are the snow dift zones designed this way?

I’m just so upset with winter off road drift zones. There’s a stupidly narrow furrow which you can’t even see, cause it’s under the snow. And if your car’s single wheel leave it, drift points will not be counted. So for 6 meters wide road you have 1.5 meters wide invisible furrow and no matter how well you drift, you will get points only if you stay in the furrow.
This is where a fun become a frustration.