Let's say I'm playing a diplomatic game rather than disagreeing. I want to know all these things, I want to avoid lawsuits for me or the manufacturer, and I want some good will / good faith all around.
There's definitely a reasonable argument (we agree on) that certain knowledge is needed to prevent an owner from damaging their own bike, and making the risks transparent by describing the systems is part of that. The wiki disclaimer and some of the spelled out "hey, live power is in here" warnings do that for us now. "Your very critical ECU is right under this panel" is unambiguously good to imply.
I'm saying there's a line we could cross, haven't, and I'm unsure how we'll deal with it as we get closer to it. That knowledge you gained to tune EFIs by decompiling firmware code didn't exactly go on the same public access, well-indexed website (or PDF service manual) that people used to change their fork oil and clutch plates. It went on a forum, right? Engineers swapping disassembled code and engineering plots on forum posts has an inherent barrier to entry. It puts it at arm's length; there's "public accessible" and "public techie" where an easy threshold can be communicated. I mean, it was you who set up the outline of common vs advanced modifications (which was good), and that is a similar kind of line.
I'll facetiously propose a wiki section: "serious wizard modifications" or maybe "Doc Brown" or "Never Go Full Tesla" which could carry such things.
For argument's sake, here's what Zero could do if we cost them a lot of money by doing this: police warrantee claims thoroughly to make us pay for things that break, adding annoying tamper detections, and sealing up their systems so tight we can't keep up with new model system information. For them, we make some good faith efforts to gently steer people away from hacking firmware or such.
I'm honestly more concerned about Sevcon than Zero. Sevcon has a real industrial business with legitimate safety / liability concerns ("oh look, we found a vulnerability that could destroy their forklift and small truck businesses"), and electric motorcycles for them make a small line of business but might turn into a real nuisance. And clearly they do more than frown upon people using their customization software: they send Cease and Desist notices.
Anyway, I hope we only disagree about "how" and not "what".