Which is usually at least 2x as much if we're talking about buying a System 76 laptop.
Windows laptops go on sale very often.
Although I will admit I have an HP laptop I brought last December that worked out of the box with Ubuntu. Nvidia drivers and all.
This is fairly easy to do by just not buying the absolute latest hardware. Installing something like Fedora in a 8-12 month old laptop I just can't recall last time I had issues.
What happens when they install Ubuntu and the Wifi doesn't even work ? An experienced Linux user might figure it out.
A new user would, very reasonably, assume Linux doesn't work and reinstall Windows.
It's easy: whatever is preinstalled will be guaranteed to work reliably. Worked for me.