So are you suggesting that it is perfectly fine to have defendants to tell the judge to go fuck themselves with zero consequences?
In principle, yes. In practice though without punishment for disrespect she'd still have to deal with having a ticked off judge deciding on the punishment for her actual CRIMES, which would not be very smart of her.
I do not believe that mere words like "fuck you" should warrant people getting sent to jail.
But lets say that she or anyone else keeps acting up in court, in my mind a more appropriate punishment would be that they temporarily lose the right of defending themselves until they calm down, which in itself could have serious consequences for the defendant.
This is some dictator kind of shit. Definitely reminds of reading about the Stalin/Hitler era, and how disrespect to the "leader" landed people in jail or even worse, getting shot.