To be fair you can also be skinny and unhealthy.![]()
Incorrect use of 'to be fair'

The point is, you can be skinny and healthy and skinny and unhealthy, you cannot be obese and healthy.
A bit of strawmanning would be that drinking peanut butter smoothie can kill you (if you have an allergy) or not (if you don't), however drinking a ricin smoothie will kill you regardless. Which is a better thing to risk drinking?