Generalizations are necessary in the science of statistics.
Most all professionals use statistics and generalizations for decision-making, and if you don't believe this, next time your medical doctor provides the possible dangers of some medical procedure that you and the doctor are considering for yourself or your loved one, notice that the doctor will discuss the probabilities of success and failure. This type of analysis, by its nature, includes generalizations. Case in point, read the below commentary posted on the United Methodist News Service website, which is an abbreviated re-print from the Michigan Christian Advocate newspaper. There is more that unites us than divides us. Al Gore said this in his concession speech.