为什么我创建链接命令 ln -s 失败，不被允许呢？

ls -l /usr/bin/python
ls: /usr/bin/python: No such file or directory

ls -l /Users/yangzh/.pyenv/versions/2.7.18/bin/python2.7
-rwxr-xr-x  1 yangzh  staff  2112072 May 16 08:34 /Users/yangzh/.pyenv/versions/2.7.18/bin/python2.7

sudo ln -s "/Users/yangzh/.pyenv/versions/2.7.18/bin/python2.7" "/usr/bin/python"
ln: /usr/bin/python: Operation not permitted

sudo ln -s /Users/yangzh/.pyenv/versions/2.7.18/bin/python2.7 /usr/bin/python 
ln: /usr/bin/python: Operation not permitted

如上所示，我用 pyenv 安装了一个 python2.7 的版本，但是想链接一下，发现不能成功......

os 是 monterey 12.3.1