1, doctors, alcohol producers, "red sorghum" in those who brew ...... they than you "exposure" to alcohol hundreds of times! And a lot of it is direct physical contact! Your little bit is just the "tip of the iceberg".
2, the normal use of alcohol is generally regarded as not carcinogenic. Alcohol cancer only occurs in the use of "high concentrations of alcohol" direct contact with the body, resulting in the body by "serious burns", which may, may, may (important words said three times) will cause cancer!