Woah woah woah... that's a little much. BMI is not ideal, but it's quick and easy for someone to figure out at home. It's not BS and there's no way it's unethic

Woah woah woah... that's a little much. BMI is not ideal, but it's quick and easy for someone to figure out at home. It's not BS and there's no way it's unethical. It's a starting point for people and nothing more. Unless you've looked through the advice they're giving on here, what even gives you the idea to say their advice is unethical?