God this is going way off topic, so just a few brief responses before I answer your question.
Ok so you weren't going mad, but you were getting shirty, semantics.
I'm suspecting based on what you're implying is that you've got yourself a case of gold rush fever. Which tells me that you're not out for the exploration, you're out there (Colonia and beyond) for the money through first discoveries.
Wrong! I've done plenty of exploring, just not gone far out. I've never been to Colonia, I did try once in my Python, fully loaded for a CG, I realised I wasn't going to make it in time so I ditched the cargo & turned back. I did stacks of mapping systems then & still do, in particular looking for Pristine metallic rings for
the related thread, check out
my latest contribution if you don't believe me. Yes I am interested in 1st discoveries too, so what?
Re neutron boosting, I've been to the Formidine rift twice, 1st time via normal jumping (& mapping on route), 2nd time via neutron boosting as I was trying to get there in time for the CG & wasn't particularly fussed about mapping along (more or less) the same route. That said, I still did look for ELWs & pris met rings (discovered or not), which no doubt made me late

. Anyway, I stuck around the Formi rift to look for URCBs around ELWs, I (with help) compiled a list of them to search & searched many of them (with help again), it's in the last Formidine rift thread if you want to see it (with a link to the list in the op). Anyway, I think we know enough each others ED credentials now

.
The bottom line is that I'm not condoning methods for circumventing power issues that are caused from taking shortcuts in the game. Especially when it comes to player conveniences because of shortcuts taken. The devs have stated the total amount of the sandbox explored is less than 5% and based on this article it's going to take a while.
How is this suggestion of yours going to solve this issue precisely?
Re short cuts, I assume you mean neutron boosting, it's in the game, it can cause system wide damage (if you're kicked out of SC in the cone), so it's quite legitimate to ask to be able to repair all modules.
Also that's not the only way the PP can become damaged, so again it makes sense to be able to repair the PP.
IIRC it's less than 0.5% of the galaxy has been explored, lol. And that isn't an issue, it's part of the game, the galaxy is massive, it's going to take a bloody long time to explore it all!

Although now I think about it, having a back up power supply will help that a tiny bit, if an explorer has a critically damaged or inoperative PP, he may decide to quit & self destruct or have no choice but to do so. Either way exploration data is lost, the galaxy takes that little bit longer to map.
I understand that you don't agree with neutron boosting & so won't support anything for it (we'll have to agree to disagree there), but a redundant power supply is an essential (if rarely needed) life saver for any deep space vessel (& others), whether 1000 LYs out or 50,000 LYs out. Even if outside of neutron boosting, damage to the PP is from human error (which will always happen at some point) doesn't mean it should remain un-repairable.
Btw, I'm not sure if you implied you're in the real Navy (respect if you are), but don't navy ships have some form of backup power supply? Or even just regular civy ships? Even if it's just a large battery pack? I'm no expert there, but I thought I'd heard or seen that before.
I do know though that passenger jets (at the least) have an emergency wind turbine generator incase all the engines fail, IIRC it's enough to provide power for flight controls, a few basic instruments & radio.
So in that light, it makes no sense that ED space ships have no back up power supply.