Not doing so leaves the ownership of the etcd binaries to the GCP user:
```
patrick@controller-1:~$ sudo mv etcd-v3.3.9-linux-amd64/etcd* /usr/local/bin/
patrick@controller-1:~$ ll /usr/local/bin/
total 33940
drwxr-xr-x 2 root root 4096 Aug 8 17:25 ./
drwxr-xr-x 10 root root 4096 Aug 6 20:34 ../
-rwxr-xr-x 1 patrick patrick 18934016 Jul 24 17:13 etcd*
-rwxr-xr-x 1 patrick patrick 15809280 Jul 24 17:13 etcdctl*
```
Patrick Decat