We have to question whether the world as it is can continue to exist. If you go to another country you need a visa. In the human body, the blood can freely circulate. Look at the example of the solar system. You cannot create a husband and wife relationship without a spouse.
Day follows night and vice versa.
Go to a low place and back up to a high place. By having a personality, we have the ability to create harmony and balance between all things. So there are barriers. We do not need barriers. Through the power of love, it becomes possible to be rid of them.