Most stereotypes exist for a reason. A lot of people within a race fit that mold. It is still racist because 100% do not fit that mold. We are all individuals. Your statement is equally racist even if a higher percentage fit your stereotype in your head.
It is not true that most people fit the stereotype. For example, show me evidence that the British have worse teeth than other people. You can't, because it's completely untrue.
https://fivethirtyeight.com/datalab/british-teeth-arent-that-bad-american-teeth-are-far-worse/
Same applies to most stereotypes. For example Jews are one of the most charitable groups in the West. It takes a 5 minutes search to verify that fact. Additionally, even though they tend to be well off financially, they are among the very few groups who vote Democrat because of their ideals of social equality even though it isn't in their economic interest.
Stereotypes are just a tool that helps ignorant people to remain comfortable in their ignorance.