Android comes pre-installed on my device, with automatic security updates and manufacturer support for the likely lifetime of the device.

I’d definitely use a Linux PC if it came out of the box ready to go like that.

I mean, it doesn’t magically appear on the device. You pay for the installation, it’s just included in the price of the device (with Windows you also pay for the license key, by the way). There are companies that’ll install Linux for you. Hell, pay me $30 and cover shipping, I’ll gladly set you up with, I don’t know, Fedora and even add a timer with notifications that’ll nag you about package updates, just like Android does.

with Windows you also pay for the license key, by the way

Your computer’s price is often subsidized by the fact that the manufacturer has an agreement with Microslop to preinstall Windows on it.