Yeah, but after the rescue and all the survivors being debriefed by Starfleet, did they outright say "it's a massive hive-mind of cybernetic organisms called the Borg who assimilate entire civilizations and can adapt in minutes to any attack you throw at it"? Or "a large invading force showed up, we don't know who they are or where they came from"
Sloane had about 45 minutes worth of traumatic interaction with the Borg while also dealing with all the futuristic stuff Picardy dumped on her and Cochrane's was seemingly just ramblings from an elderly alcoholic. I'd doubt anyone from the future left them with detailed intelligence files on the Borg.
Then 50 years later a remote outpost finds something but kinda gets wiped out with only some hearsay from a couple officers. Fledging Starfleet may not have even connected the dotted-line.
But did B-era Guinan even know if it was the Borg who attacked her planet? Or could it just be massive starships just showed up and started wiping out her planet and only long after the fact was it proven to be Borg?
And it's not like they'd have some completely out of left-field right-field pick for some higher ranking position to write the forward to said book....
Sisko used his transporter allotment to visit his father while he was a first year cadet. It's not about energy limits, it's likely just an allowance for cadets, especially first year, to get them acclimated to structure and working within limits.
This could sort of like be an old post on r/DaystromInstitute about how holodeck time could be used as a currency between crewman, and also a tangible punishment.
This is exactly how Kemp managed to stay Governor of GA for a while, and why Abrams was raked over the coals for nearly going door to door urging people to register.
Picardo, Trinneer, Meaney...