> Note that no one is stopping you from running thunderbird. It sounds like you downloaded a dynamically linked binary distribution and there's probably just an elf file you need to run. Otherwise if the binary is incompatible you can build it from the source (I've never tried thunderbird, Firefox is a bit much but it's doable and there are of course ways to automate it such as running a Gentoo prefix or using the spec files from your distribution itself.)

You should put yourself in the mind of someone who doesn't work with computers for a living. Then, read that to yourself again and see how much of it is complete nonsense. You should not have to know what any of those words mean to use an operating system, and if you do that is either the fault of the OS or the software, not the fault of the user.