The use of the term "corrupt" rather than "alter" or "affect" is assuming the conclusion here. The human mind is not something that always works in the same Platonic perfection in a state of nature. Biological and cultural differences are major factors in what is considered normal at any given place and time.
Some people have conditions that make the way their brains work different than what is considered normal. Western technological culture imposes differences in social interaction and pressures on thinking and required performance that are far different than existed in societies even mere hundreds of years before.
Drugs can be a way to compensate for these pressures and find a way to exist in the world with as much equanimity as possible. And I say all this as a person who avoids all caffeine and illegal drugs, and uses alcohol very infrequently. I'm lucky I can do this and thrive in today's Western culture. Not everyone is as fortunate.
Some people have conditions that make the way their brains work different than what is considered normal. Western technological culture imposes differences in social interaction and pressures on thinking and required performance that are far different than existed in societies even mere hundreds of years before.
Drugs can be a way to compensate for these pressures and find a way to exist in the world with as much equanimity as possible. And I say all this as a person who avoids all caffeine and illegal drugs, and uses alcohol very infrequently. I'm lucky I can do this and thrive in today's Western culture. Not everyone is as fortunate.