Unable to disable MDM on macbook pro with Ventura

My son bought this Macbook from some guy for cheap. Did'nt bother to check if he can login and use it. I wiped the macbook clean. And installed ventura, after it asked for wifi and country name, it goes into the MDM menu. I turned ON macbook with CMD+R, went into terminal and did echo "0.0.0.0 iprofiles.apple.com" >> /etc/hosts Made sure the command succeeded by cat /etc/hosts. Exit from terminal. Now back in the mac recovery menu and choose 'install MacOS', it does its thing for 50 minutes and after a few apple logo's, it takes me back to the MDM and hangs. The editing of /etc/hosts file to block iprofiles.apple.com is not sticking after reboot. Please help me in completing install of MacOS after bypassing the MDM.