Exactly. If I have a drive failure on the other side of the ocean, we know immediately from automated notifications and simply have the duty engineer swap the drive with a new one which is inside the cage itself. It’s almost instantaneous.
I became a master at doing upgrades, re-configuring lines/hardware remotely since making those trips all the time is time-consuming. I still had to go when those locations moved offices, for Y2K testing (some vendors wouldn't certify hardware so things had to be replaced/upgraded) and things like that, but fixing things (simply replacing drives, os upgrades, application upgrades, etc.) could mostly be done remotely with the help of non-techincal people on the other end to push a button, slide a drive in, etc.
It always took nerves of steel to type in that "shutdown -r" command to reboot... and my blood pressure always went sky high waiting to be able to telnet or dial back in when it's up. But I did it countless times and it always worked.