system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] How do planetary blockades work?

When a planet is blockaded we usually see capital ships and such arranged in a ring around the planet's equator. 

Why don't the invading ships or the fleeing populace just enter or leave via the planet's poles?
gpt
At least with the blockade of Naboo it is clearly shown that an advanced ship like the Queen's yacht can run the blockade and make it through with minimal damage.  What can't make it are freighters carrying supplies and trade goods.  Just like a real naval blockade a fast motorboat can get through but thats not what the blockade is tryign to stop.  The want to stop trade like a medevil seige.