Just look at Li Chang Hu for instance! The last few times he had visited, he had noticed that Li Chang Hu was actually a passable cook! Of course, he wasn't the sort of cook who would mix together ingredients to create cultivation supplements, he was just a decent cook by mortal standards, making food that tasted good and looked presentable!
It seemed a bit strange to Di Tou at the time, but thinking about it now, Li Chang Hu was already in the Nascent Soul Stage! At such a level of cultivation, the amount and quality of supplements or ingredients he would need to bolster his cultivation wasn't a reasonable amount, and in the end no matter what he cooked, it would likely turn out to be a bit of a waste. That being the case, why waste money and flavor? Why not just cook something that tasted good.