what agenda do you have that wins if power of love is real and connected to haki?
It has to be connected with haki.
Will power is the basis of haki or you can say Haki is physical manifestation of will power.
And, in one piece what drives the will power the most? Answer is emotions.
Usopp awakening CoO out of desperation to save his friends.
Luffy subconsciously used it in MF out of desperation to reach out to Ace
Zoro - " nothing happened "moment is based on his strong emotions to protect his captain.
Love is an emotion so power of love has physical manifestation as well - haki.
This is one of the reason I believe Sanji is bound to get CoC because Oda always highlighted his buring passion and power of love.