That will allow air to enter the crankcase without creating a resistance to the airflow caused by the low pressure area at the bolonga-sliced end of the road draft
More rocket science?
The low pressure area at the road draft tube doesn't "create a resistance", it's what causes air to enter the crankcase. "Resistance" would be a high pressure area.
Making a hole elsewhere in the tube means ruins that function, so the fumes just do whatever they want.
Yes, that's much better.
You do have a day, job, don't you?
