Earlier quoted context omitted.
Casual users don't install an OS, as i said they don't even install an ad blocker or change the keyboard shortcuts to an app. The people you are talking about are enthusiasts, the probably re-installed Windows before too,
> Casual users don't install an OS Your definition is useless: it would just mean that casual users simply never use Linux OS at all, and aren't supposed to use it, as these with your definition also wouldn't have an awareness to specifically buy a separate computer with preinstalled Linux. To make a definition of a "Linux casual user" in any way meaningful, you have to assume that it's somebody who would like to try…
In my definition a casual user has his computer setup and managed by somebody else. Someone that helps the casual person to buy the laptop/PC that fits their budget and needs, that installs the browser and extensions for them, that installs the apps they need like Skype.Word installs the printer and other devices for them.
Someone that can installs Linux (usually you need to go in BIOS/UEFI to enable boot order and disable secure boot and other shit) is not a casual in my opinion.
Do you think that Ubuntu users are the casuals and Arch are the power users? I will disagree with that, I used Arch in the past but now I am happy with Kubuntu LTS just because a DE and OS is a launcher for my applications and not a identity.
About Ubuntu home page, I assume Canonical is not trying to target the casuals with that page, casuals can't just download and install Ubuntu on any random laptop or PC, there s also no money to be made.