In your zeal, you are reading too much into it. Nowhere does it say love is not sufficient.
In fact, since you brought up real meanings:
36 “Teacher, which is the great commandment in the law?” 37 And he said to him, “You shall love the Lord your God with all your heart, and with all your soul, and with all your mind. 38 This is the great and first commandment. 39 And a second is like it, You shall love your neighbor as yourself. 40 On these two commandments depend all the law and the prophets.”
16 For God so loved the world that he gave his only Son, that whoever believes in him should not perish but have eternal life.
1 John 4:19
19 We love, because he first loved us.
Doctrine follows love - not the other way around.