Now that might seem like a weird question as the answer might seem obvious...but let's look at another coin.
The Coin of Life. It has two sides as well. It has a heads and tails, but let's call them 'positive outlook' and 'negative outlook'
How do you perceive this coin? Which side is the true and real coin of life?
To look and grasp at life with either a positive or negative outlook is to not see the total coin. To choose one over the other is to deny the reality of the other. Both outlooks are in many ways 'deluded'. Both are ghosts. To grab at one and reject the other is to live in suffering...even tho the positive feels better...it is still a trap of the mind and will continue your suffering...especially when negative shows up and you don't want it.
Zen is about seeing the Coin in its totality. No thoughts of one side better than the other. It is a Coin...just as it is. You use both sides all the time.
In Budo this is also very important. To grasp and hold onto only certain 'techniques' as good or bad disrupts your ability to flow with what is needed moment by moment. You are trying to use only one side of the coin...dumb! It is important to embrace the fight and use the coin in its totality. It is there. Use it. To reject one side for the other will get your ass handed to you.
Hope my morning rambling makes some sense...I have to get to work and maybe will edit this later or wait for comments.
Hands palm to palm,