What do you mean by this? If you're trying to say that anyone who dies in the imaginary space of Rimuru's stomach wouldn't actually die, as everything in that place is imaginary, then that doesn't make sense. If this was true then Ifrit wouldn't be afraid of dueling nor would he be afraid of dying/having his conceptual self destroyed, and he specifically says "Only for you, Master Veldora! I'm not-" as to mean that it's something about Veldora that makes him able to survive conceptual erasure/destruction. Veldora makes it seem like it's not a big deal having their conceptual self destroyed, as though that has happened many times before, stating "And having your conceptual self destroyed isn't the same as death, is it?" as a genuine question(This is the biggest thing for me) with Ifrit stating only for Veldora is this not a problem. Too bad we don't get to know what Ifrit says afterwards, or it would have given us a answer.
Edit: I found a even more bullshit story that has plot manipulation, fate manipulation in the first 100 chapters of the novel, a infinite multiverse with bullshit powers and strong people. Protagonist halo/aura, a character inside the story being able to read the plot and change it, a multiversal-protagonist killing system(The system kills protagonists to take their halo, the main character was manipulated and killed by this system), in one world(probably planet, don't know since the will of that world can change the timeline of the world(planet?), each planet has their own timeline, will, and more bullshit things) every person has a conceptual ability, though not powerful they can use the power of concepts because the will of the world gave them those authorities (to battles against otherworldly invaders) and since this is only a planet inside the infinite multiverse I am expecting more bullshit and abilities. The main character is growing strong and can already cancel out the concept of destiny, and luck as well as many abilities because of his error property, so I'm expecting him to be more bullshit than Rimuru.
The webnovel I'm talking about is called "Soul of Negary". and don't worry it has a really good plot with nice side stories and mysteries.