Honestly this is my perspective too. Not saying bad times are good, but that history shows us many different times periods and of wide variety of environmental conditions.

Honestly, there are a lot of places that the climate could go and none of them are good for us. Human history had already begun and we were still in the midst of an ice age which, if we had the same sort of ice age today would wipe out half of the countries on the planet. We've also had warmer periods, and they ended up making the center of the supercontinents that existed at the time completely uninhabitable because water just wasn't making it over there.

Looking at things from geographical scales makes you realize how ephemeral a lot of the things that we consider to be important to be. If we plan to Forest today, over geographical time. It will grow, die, decompose into co2, and grow again and there won't even be a big impact on the geographical record not like the carboniferous period. On the other hand, sedimentary rock makes up entire mountains, and represents life taking unimaginable amounts of CO2 out of the atmosphere, binding it up with minerals like calcium, and that carbon precipitating onto the ocean bed over millions of years.

The dominant species on Earth didn't alway survived these events, but even when the ice age after the oxygen catastrophe turns the entire globe into an ice cube, 10% of Life survived and went on to become everything.

So besides the lesson that we can change the world for the worst, I think we need to be thinking about how we can make sure our species is resilient because another ice age will come. It's inevitable. There may be another time that we pulled too much carbon out of the atmosphere, that could come too. There are so many things that we need to be worrying about and instead we focus on one problem. I really think that that's human nature.