SELinux is a couple decades old.
https://docs.fedoraproject.org/en-US/quick-docs/selinux-gett...
https://docs.fedoraproject.org/en-US/quick-docs/selinux-gett...
"Why doesn't SELinux confine desktop applications" https://access.redhat.com/solutions/1578673
If your text editor can own your account, it doesn't count.