What's your point? This point is completely off topic

The original comment made it seem like it was a completely arbitrary point of comparison for what "humans like". Instead, the benchmark that is used is what the environment would be like if we took out the massive contributions to global warming and CO2 concentration caused by industrialism

Are pre-industrial levels "more comfortable" for humans? Sure, maybe I guess. It's probably "more comfortable" for the vast majority of species that are currently adapted for that biosphere. Why does that matter? The point is we're rapidly changing the global temperature levels as well as the co2 concentration rates (and many other environmental "abiotic" factors) at a rate that threatens most of life on earth. Shooting for "pre-industrial levels" as a benchmark is an obvious and easy, if a bit lazy, way to work towards an environment that most of life on earth is already adapted for