Yeah you are.
Will one do? I'm supposed to be working here. :-) How about this: "In 2002, 1.5% of all native-born Japanese women between the ages of 18 and 25 married a native-born American man, an increase of 87% over the previous year."
I take it that's a projection over the whole population based on a statistical sample. Ergo, a generalization.
Next!
The whole complaint with generalizations is rather sophomoric. Generalizations are useful and often necessary tools in discourse. They aren't inherently bad, they're only bad if they're incorrect.
Generalizations are about sets, not specifics. A problem can arise if folks assume a generalization about a set is necessarily applicable to any member of that set; that's stereotyping. Stereotyping is not useful, but that doesn't mean that the utility of generalizations should be ignored.
Why do you "take it" that that's a projection? In fact, it's a statistic based on a house-by-house census. Look, rather than admit that generalizations are not "necessary" (again, your word) in discussing cultural phenomena, you're willing to play word games and continually shift the argument. Doesn't make for a very fruitful discussion.