You missed the point. Dressing in a suit is NOT alpha. And, in fact, if it's not representing WHO YOU ARE, it's going to INCONGRUENT and NOT alpha at all.
Dressing alpha is dressing with what is authentically you. For some guys...sure that's a suit. For others, it's going to be a punk rocker look, for others, much more casual. For others, it's a top hat.
Take a confident, 'alpha' (I hate that word) guy, and REGARDLESS of what he wears he is going to project an 'alpha' image much more clearly than an AFC you put in a suit. Bottomline. So, again, I repeat, 'looking alpha' has nothing to do with what you wear, your jawline (I know plenty of pudgy guys who are 'alpha'), it's all about your attitude and WHAT YOU PROJECT.
Saying, "dress in a suit to be alpha" is completely misconstrued advice.
Now, if you wanted to make the argument that it's a two way relationship...dress in a certain way and it might affect your internal state. Well, that's a bit more tenable. Still, though, it is going to bring about SHORT RUN results at best.