Why are enzymes so expensive?

Could you elaborate on the reasons behind the high cost of enzymes? Are there specific factors that contribute to their price, such as the complexity of their production process, the rarity of their raw materials, or the demand for them in various industries? Additionally, are there any efforts being made to reduce the cost of enzymes, perhaps through advancements in biotechnology or alternative production methods? Understanding the underlying factors behind their expense could help us better appreciate the value of enzymes and their role in various applications.