You can change it if you have admin rights. But Windows is mostly used by businesses still, which dont let their users control anything.
Also, Windows isnt a cheap operating system. If Im gonna pay for something, it better be useable. When I use Linux, I expect it to be basically unuseable out of the box and need a lot of changes to get it working, but thats ok because I didnt pay for it
The point is more that if we have more processing power in a tiny device in our pockets than NASA (and most of the world combined) had in the 60s, everything else also should have advanced at a similar rate. So why am I not living on Pluto?