Why should it be the other way? Just because you're good at Physical, if someone starts a social conflict, you can just punch them in the face and describe a Taken Out result where they don't have to talk to them?
That's a perfectly allowed course of action in reality. Why not in the game? It is a choice that can carry
heavy consequences, but it is an
allowed choice.
Violence is the ultimate negotiation. To quote Robert Heinlein, "Violence, naked force, has settled more issues in history than has any
other factor, and the contrary opinion is wishful thinking at its worst." With violence as the final potential arbitrator of any situation, what then makes social conflict a plausible option to begin with? There are no arbitrary rules of reality (the game) to
force people into social conflict over physical ones so, generally, it is the conventions adopted by society as a whole.
In the Dresdenverse,society, both mortal and supernatural, has adopted various constructs of rules and regulations on when the use of violence is acceptable. Conversely, there are also punishments for individuals who defy those conventions. If someone is giving you too much lip in a bar and you decide to get physical rather than just take the social loss, then bouncers and potentially even bystanders and/or the police are going to get involved. If a wizard is losing a social fight to a WCV and lights him up, unless the vamp gave one of the strictly worded reasons for violence under the Accords, that wizard just committed an
act of war to avoid losing one Social conflict. Just for the privilege of switching the mode of the fight to one of his strengths, he's not only going to have a bunch of Whites wanting his head, but probably a fair part of the White Council too.
When you're dealing with potent fae, who's deaths can unbalance nature itself, and wizards that can level city blocks with their death curse, violence outside of tight constraints is something the vast majority of entities is going to find objectionable in the extreme, and they will certainly make that displeasure felt most potently on anarchs that regularly violate the conventions on combat. So in addition to the hazards of misjudging the combat strength of your social opponent and getting dead rather than simply humiliated, there is also all of the other fallout that comes from talking with your fists all the time. There is no need for a kludge rule fix when in-game consequences already provide heavy deterrent to abuse.
If something is important enough to a character where they are willing to risk all of that to start a fight (or if the character is just dumb or stubborn enough to do it anyway), maybe you should let them, and then let them deal with the consequences of that choice.
Happens to Harry all the time.