This is a meme that fails to understand the actual, in practice limitations of BMI. The problem is that it
underdiagnoses obesity, not that it overdiagnoses it. The problem isn't the nonexistent horde of lean muscular people with BMI > 25, it's all the clinically obese people with BMI < 30 thinking that yeah they're overweight but it's not that bad, they're not obese.
https://pmc.ncbi.nlm.nih.gov/articles/PMC2877506/#:~:text=BM...