are you also incapable of "blocking things out"?

(not diagnosed, suspecting and mainly just curious on an opinion), but i've asked numerous people around me how they deal with certain noises and certain things and i just get "I just block it out" but literally how?? I hear every noise in my day, the people talking outside, the construction, the typing noise of my computer, my dog barking, and I'm completely incapable of blocking those things out unless i'm asleep. Does anyone else have this issue? Is it even an issue?