Good points. I don't find these thoughts to be misanthropic or nihliistic at all. We've had a good run. We've had a lot of successes as a species and weve had some failires too. Recognizinf that doesn't mean you're gleeful for all the suffering. Or that you're "giving up".
Basically it just means you don't need all that ridiculous hopium about the future to carry on with your day.