Ubuntu Rant! You need Ubuntu to install Ubuntu

Ubuntu "engineers" are probably dumber than Enterprise Linux OS's engineers. I got a laptop from a friend who asked me to install the latest Ubuntu on it. My usual technique of make a live bootable usb faild. So, I googled and found this evidence that Ubuntu engineers are retarded.

You need Ubuntu to install Ubuntu. This reminds me a bit that Redmond company. What if I have another OS ? NOT Mac or Windows ? For example, Debian? can't you just write how to obtain that package ???