Do people go by weight or BMI?

Earlier today I went to the doctor and he told me I am overweight. I am 5'11 and 195 lb. He said my BMI is 28. He recommended for me to lose weight and said I should be around 18.5 to 24.9. if I follow what the doctor recommends do you think I'm going to look too skinny

Do people go by weight or BMI?
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