.
They are the same thing in the sense of CFOP with an XCross is the same as CFOP with Cross. Briggs is better because CPFB which is definitely viable in inspection. It's not easy, but viable. Also, I have done CP properly and I can confirm that CPFB in inspection is viable. Inspect CP in 2 seconds (and this is possible, just as I can inspect EO in 2 seconds), find a square in 4 (done by Rouxers consistently), trace CP and the final edge through the square (4 seconds) then you know when to insert the edge into the pair. Yes, I think that it's possible. Also yes, you will have a horrible pause before EO in LEOR, Briggs or your version of Briggs which is why this is not speedsolving viable. Yes, tricks can reduce that but not enough imo. That's why LEOR is the best out of all these because it's feasible to inspect FB and at least some of EO consistently.
Using your example, if I solve ZZ EO using set ups to MU and someone else does EO the normal way, they don't use different methods. If I inspect cross then a pair and someone else inspects a 2x2x2 then the rest of the cross, they don't use different methods. If someone inspecs FB then places DFDB and carrys on with Petrus, they're using Petrus.
I would also agree that Briggs wasn't a new concept, rather a rediscovered concept that built on ideas but it came first and it's the best name we have and is the standard name. It works. I'm fine with your way of doing CP being called the YruRU style or whatever though.
I still don't think that YruRU is the best way to do CP because they're all the same at the end of the day, with some systems allowing for different things such as tracking CP (2GR system) or CP when DL corners are solved (YruRU) and they can pretty much be fused together to make the same thing.
One more thing, calling your opponent a liar is a bad way to debate because you're attacking the mesenger not the message.
Conveniently sidelining my point to place your analogies is a bad way to debate as well. As for my claim on lying, all I mean is if people jump in saying they have done it rather than they think it’s possible to do it, then without sufficient proof my null hypothesis will be to assume that they’re lying. This is because, as you pointed out, it is ridiculously hard to do and at the very least requires tons of dedicated practice just for this step, which I’m not aware of anyone has put in. In any case, it is difficult to provide sufficient proof of this kind unless interacting in person or video call.
For now, putting aside the viability of sub15 CPFB and whether the YruRU way is objectively the best; let’s take the analogies you made to show you my point in those.
The concept of EO-first to reduce to LUR I presume was floating from before 2000. Let’s say in 2005, a person “came up with the way” to do EO with set-ups to MU since this way of doing it is known through Roux; and simultaneously place DBDF so that the cube is reduced to LUR. Then, do LB, RB, LL; because that’s like the obvious skeleton that follows. This person called this method AA, their initials.
Come 2006, another person finds a way to do EO using F, B moves; and simultaneously place DBDF. Then follows with LB, RB, LL. This person calls this method BB, their initials.
Now, BB is quite similar to AA, but has an element that is completely new and novel. Also, whether BB is speedsolving viable is up for debate even today, but it is objectively a better approach than AA. Would you rather AA stay the name or BB or keep them separate?
(I’m not sure about the history of cubing but afaik a similar thing happened with CFOP on discovery of F2L and they stuck with the latter option of keeping them separate and seeing which idea performs better)
This situation is just that. The crux of the method is that one CP step, the rest is mere embellishment. YruRU’s way you may not agree is supreme for now, but it at the very least is better than Briggs’ way; which is just comms, which we know is like the brute force way of doing CP. Whether YruRU is speedsolving viable is up for debate, but it certainly is miles ahead of Briggs; and it doesn’t build on it in the least. What would you rather here?