10, 15 years from now the ability to run your own code will be a distant memory unless you constantly subscribe to an annual Developer Account with BigCorp. Oh no, you've coded something that violates the ToS; account terminated.
On Linux and Windows it doesn't make a huge difference to be admin or not on a single user system. If you have a process on windows running with your user rights it can access all your data, which means game over already. Same on Linux if you aren't using heavily sandboxed flatpaks or do not run all your apps inside jails using tools like landrun or firejail.
or does your xterm binary scans your contract list and recently opened apps and upload all that to Facebook servers? because most apps on your so secure phone do exactly that