Installing an operating system needs an essential component, which is a bootable USB drive. You can plug it into any system with a compatible BIOS/UEFI and boot from it. It's a common practice ever ...
The loop of recreating a bootable USB drive for every reinstall or troubleshooting became unbearable for me. I switched to a Ventoy drive a long time back, and it's saved me so much time. Before that ...