Fair enough. Note that what I said wasn't a defense of Serena but a critique of some of the criticism against her. It's one thing to say as you did that what she did was not within the realm in which an umpire should use discretion. It's another to act as though umpires should never exercise discretion - in which case the analogy to speed limits applies. 10% isn't 1 MPH!Everyone except trolls and haters would be siding with Serena if it was a "one mile an hour over the speed limit", and by the way where I live you get a fine if you go 10%+ over the speed limit.
Ramos could exercise discretion and not give her the second warning for breaking a racket, but IMO the third warning and game penalty should be the de facto rule there after all that went on.
For what it's worth, I would say that the racket was the one in which she merited a warning, not the continued arguing! But there you go.