Good news is that in this scenario it’s simulated suffering and not “real” suffering.
Of course, from the POV of any such simulation, the simulated suffering is real within the context of the simulation.
But realistically, it's already a giant leap - a thought experiment, mostly - to wonder if we're in a simulation. To then extrapolate our IRL experiences to some parallel In-Simulation-Life (ISL) value is pushing the thought experiment to ridiculous levels.
I fully understand some people disagree as you’re saying. But I believe they aren’t being intellectually honest with themselves and are actually just trying to excuse the reality of simulated suffering.