Yesterday I was on the street and I saw a young man with good development and big masseters a good jawline and I noticed that he pressing his teeth, I noticed by the contraction of the masseter
Did that make me think, that would be maleficent or beneficent?
A lei do esforço nunca falha
Single person case studies are not sufficient to conclude anything. Especially since you can't prove this man actually lives in a constant state of clenching.
Other than that clenching wears your teeth down badly and reduces your lower third height. Bad if you're a guy. It can also deepen your bite which means your mandible gets pushed further back into your face. Jaw problems may also develop