“We’re gonna make the entire ship run on AA batteries for simplicity and ease of replacement. But the Holodeck has to run on D cell batteries” some unknown Starfleet engineer
In Starfleet? Where systems fail all the time due to unpredictable circumstances? No one so foolish would ever get out of engineering school, let alone make it as a starship designer. It is a basic rule of engineering that you expect systems to fail and design safeguards against it. That's the whole point of Murphy's Law. People think it's just a wry observation, but Murphy was a safety engineer and his law was about the importance of anticipating every possible failure mode, because anything that can go wrong eventually will.
With due respect Starfleet utilizes secondary backups and doesn't always predict worst case scenarios as well as the simply fact that this involves drama. Even the manual overrides fail on Voyager. How does that make sense? In fact, it doesn't, and while my more technical side is fussed, the other side of me goes "Eh, it's Star Trek. Happens all the time." And it does.
It's easy - you have crank generators and you move them into the holodeck and then have holographic superman turn then.
And this is how we know it's Star Trek It would not be a full fledge nostalgia fest unless it had tech that makes no sense.