Answer:
Ever heard of minecraft?
Explanation:
ok you want a story? heres a story: if we didnt have round objects in our lives we could neatly organize everything because it would all be squares. BUT basketball would literally not be a thing anymore because it needs to be round to bounce. also if were not just talking about objects but living things too, you ever think it would be uncomfortable to sleep? AND you wouldnt have to worry about just stepping on legs anymore, cuz everything would have corners. i could keep going if you want ;p