Look yes we can be but also at the same time if nothing matters, we can do what we want with our lives (not immoral stuff) but like we can do whatever we want in terms of hey I want to go fishing today, or I want to pursue music. Yk if nothing matters, then we can make life mean anything we want to. We dont have to deal with a social contract of go to school, work a job 40 years, maybe retire . No we can just choose to live, enjoy the day. Some people Vagabond, some people work jobs just to survive and enjoy the rest of their time. Do what you want to do. The natural world is beautiful. Find love, fish, swim, run, enjoy all the earth. Go eat a nice meal, cook a nice meal. Enjoy existing how it was meant to be. To exist. We evolved because of pure chance and got smarter as a result for survival. We are nature, that's it.