Of course they can. They might be too lazy or ignorant to do so, but it's not really any harder to learn to install Linux than it is to learn to make mashed potatoes once you're motivated to bother -- and billions of people have managed to do the latter just fine.
Normal people are absolutely capable of following basic directions like: "download this file", "insert a USB stick", "run this program", "reboot your computer", "double click the install icon", "click the 'Continue' button (or similar) following the on-screen prompts".
The file in question -- good enough for most people with a Windows computer from the last decade: https://pub.linuxmint.io/stable/22.3/linuxmint-22.3-cinnamon...
The program to run: https://etcher.balena.io/#download-etcher
Detailed instructions here, including screenshots if you need them: https://linuxmint-installation-guide.readthedocs.io/en/lates...