I'm not asking what you'd like to do. I'd like to be able to customize all of those things too.

I'm asking why taking a device that uses a microcontroller and making a new model with an ARM chipset and a Linux-based OS seems to suddenly make people treat the ability to install custom software on it as a fundamental right.

If I own it, regardless of if it's Linux or ARM based, I should be able to install things on it.