system
Given the following post, respond as if you're commenting on Reddit:
human
[FMA:B] If alchemy is so insanely powerful and can be learned from books, why are there so few alchemists?
gpt
Investing can be learnt from books, why isn't everyone Warren Buffet?

It takes a special kind of person to pursue Alchemy, same as any other profession.  Its hard, requires endless hours of study/practice and not everyone has the drive to become an alchemist.