Earlier quoted context omitted.
There's a lot of things to pick at desktop Linux for, but maintenance is not one of them, especially not on a mainstream fixed-release distro like Ubuntu. Once you're set up, you're good to go, and you have full control over what you want to change.
That's not exactly the whole truth though. There are tons of issues with desktop Linux lurking in the background, waiting to bite you. Even something as simple as changing one your monitors might land you in deep trouble, or a printer that somehow doesn't work.
I think the biggest difference is that if something goes wrong, the availability and simplicity of documentation is way worse than Windows/Mac for the most part. The upside is that sometimes the level of access you have to bits and pieces lets you fix stuff that wouldn't be possible on other platforms. For the average user that's pretty irrelevant, though.
I don't really buy the general concept that Linux is boobytrapped any more than other OSes.