They say there cannot be love without hate, and there cannot be hate without love. If you love someone, you will be capable of hating them one day, and if you hate someone, then maybe you will fall for them someday. After all, history is riddled with stories of the love between the greatest enemies and the most ferocious lovers.
"And that's why much of it was lost for the gods."
The gods are indeed capable of many emotions, but they do not have the league of love or lust, the two main components that make life worth living, being removed as an option itself for the gods, making the most efficient functioning heaven possible. With no connections like that, there would be no love being born or any half-borns existing anymore.