If you want to explore Linux and don't know what BIOS is, it's probably better to be in a VM than trying to achieve dual-boot or totally wiping your Windows install.
Why should you care about your system firmware when you're running a modern Linux distro? I gave Ubuntu to people who had no idea what a BIOS was almost 18 years ago, and I promise things are better now.
If your can use Windows or Mac OS then you can use Linux. What does BIOS have to do with it?
My non-technical wife has installed and is using Ubuntu. With this mentioned BIOS/UEFI block it would be much more tricky for her to get started.
That's the issue here.
They're just locking people and making it difficult for them to grow and explore other OS such as Linux.
That's a bad attitude!