Back then there weren't fats in denial. Also despite this being a meme, BMI is frequently inaccurate. What non-people often like to ignore however is that the BMI chart tends to underestimate how fat someone is, not overestimate. There are exceptional cases of people being ripped enough to not be fat despite having a BMI over 24.9 but usually it's the opposite problem, with people in the "healthy" range actually being overweight if you go by bf%.