No, by that logic I prove that you do not know the purpose of the disclaimers. Just because you do not know the purpose does not mean there is no purpose.
In reality, the purpose is to warn people ahead of time what they might encounter in the game, and decide for themselves if they still want to play it.
For example, lets say that someone has actually been raped, and they are into kinky fantasy transformation scenarios as a way to reclaim their trauma for themselves.. But they still have PTSD from the idea of those transformation scenarios being forced on someone against their will. For them, if it's not consented to in-world, it can literally trigger a trauma-induced fight-or-flight panic mode.
The disclaimer is there to warn such people that such content is in the game. They can read the disclaimer, see that something in the game might trigger their PTSD, and decide not to play the game.