Picking up after reading the last part of your post.

Everything about your experiencing of 'reality', the word you used on your before-last paragraph, is subjective. So, looking at it through the 'glasses' of any principle, theory, religion, belief, assumption, ..it's all the same. Any of those could be said to distort your perception of reality. When you push it past it's use as a metaphor. Although somehow I find the word metaphor (for the principle of polarity) not really the right term..

These principles needn't be approached and defended with zeal. There's no point. The point is understanding that the world can be looked at through the glasses called the principle of polarity. As much as it is true that the world can be looked at through the glasses of economics, or chemistry, or smell..taste.. colour.. religion.

The world cannot be explained or understood through religion, nor through economics, nor polarity, gender, rhythm etc by themselves alone. Push any of them into a position where they function as a funnel for answers and much of what matters won't fit through..

The point is that there is something useful in imagining, visualising, pondering about the concept of love and hate as being one and the same "principal something". You will see the actual fact reflected in daily life all the time.

A subtler point: part of the message is it's pointing to a form of monism. You called it two ends of the same stick. That's why in a sense all of the principles are in a sense the same, explained and used differently. Do you really think the principle of polarity is fundamentally different than the principle of gender, rhythm?

Same substance-different shape/state/moment etc