Abstruse yellow chi was extremely precious but Ye Mo didn't have to have it. He had more chaos chi. Chaos chi was just like Abstruse yellow chi. They both came after the birth of the universe. Abstruse yellow chi was more valuable than chaos chi in that it could cleanse one's spirit and immortal root as well as make the body stronger.
Now, Ye Mo had reached divine body. His bitter bamboo and chaos tree had the same spirit cleansing and immortal root cleansing abilities.
Comparatively, the chaos chi was more valuable in learning chaos dao as well as condensing god art law. Therefore, the chaos chi was more useful to him.
The reason he used that many chaos chi to reach dao actualisation peak stage was because his cultivation method was too powerful and he had the chaos tree. If it was some other person who had a gourd full of chaos chi like this one, he could even use it to vindicate primordial essence divine emperor.