In the minds of the Immortal City Cultivators, the city is rich in resources, and each major family has its own Alchemist refining the elixirs. Their status is not high.
It's because only those with less talent would choose the path of an Alchemist. If they have high talent, wouldn't it be a waste of resources if they don't work hard on Cultivation and improve their Cultivation level?
For Cultivators, time is extremely precious. Who among the truly gifted in Cultivation would be willing to waste time on such auxiliary techniques?
Moreover, at the beginning, those who could receive the news about the Alchemy Room were major Cultivation families. They were more cautious and wouldn't casually push their family disciples in without knowing Jin Quanxiu's intention.
However, after time passes and the news gradually fell to the level of civilian Cultivators, the situation changes slightly.