On other side it is what they are tuned to produce. It is what majority wants or accepts or at least expects. If that type of content is everywhere. And various types of "leetspeak" or slang is considered unprofessional and thus undesirable. That is what you have left.
On other side, you have to think uproar what something that could be perceived as say racist by most radical people would cause... You really don't have much left and to aim at blandness. With certain flourishes that makes you look more "Learned".
Claude says it can speak 5 kinds of 1337. It even built a simulated blue box for me complete with keypad, 2600 button, and KP tone button. Then it made a modem simulator with buttons for all the different tones/warbles/screams.
Which is to say, tuning fights with prompts less as the models and interfaces improve.