You aren't getting it.
The point is, you are trying to pigeon hole a PC into generations to compare it to consoles by nit-picking.
Here is the real kicker... The PC doesn't have generations.
A year later (2005 vs 2006) made all the difference for PC gaming that could give a PC a life longer than the 360.

No the point is that you get more power out of  a console than a pc with the same hardware thats the point, so .......you dont get it

1. Yes, just as PS4/X1 was gimped when 90% of their games were also being developed for last gen, this is also the constant reality for PC gamers. Similar to PC gamers Scorpio may frequently offer a 60fps advantage if it features a new CPU. If Microsoft doesn't enforce a temporary (2-3years?) worth of X1 support many X1 gamers would feel cheated with release of Scorpio. MS are not (yet)pushing Scorpio as a X1 replacement.

2. Not all Scorpio games will run at native 4k30fps, but using PC benchmarks is not reliable especially without looking at overall graphical settings etc. Xbox One games that reach 1080p typically have much lower graphical settings (whilst also being more optimised) when compared to PC 1080p benchmarks. The same will apply to 4k.

3. Yes Microsoft is giving consumers an option. If you like PC gaming and have a good rig then Scorpio isn't for you, but Console gamers =/= PC gamers. The Xbox S seems to be off to a good start despite Microsoft announcing most exclusives will also be on PC.

4. RX 480 (5.5Tflops) was just released and costs like $350 right? So Ms could probably get it for $200 on Mass production atm, fast forward to fall 2017 and I think the Scorpio will make a clean profit at $499

Its only confusing if you expect Scorpio to have huge sales targets versus an initial focus on profit margins.

You get the same amount of power. The hardware is a fixed limitation in a console. The PC just does more at once, that's the entire point.

You are grabbing a console port which is graphically doing more on PC (Sometimes looking a generation ahead) and thinking because the console is also running it, it's some special optimization, when really it isn't.
If a game is made for the high-level API on the Xbox 360, then performance is likely to be roughly the same as the PC equivalent.

There are also lots of games on PC which require less hardware for equivalent graphics as the Xbox 360 version during the first half of the generation like Oblivion, Bioshock, Unreal Tournament 3, Half Life 2, Doom 3, Need for Speed Most Wanted and Carbon, Tom Clany's Rainbow Six: Vegas... The list goes on.
Then as the generation progressed PC games started to look a generation ahead.

Now if you were to compare games that were built for the Xbox 360's low-level API's, then it will likely have an edge.. But the PC is also heading down that path now with Vulkan and Direct X 12.
nVidia and AMD have also sunk tons of man power, millions of dollars, years of development fine tuning their drivers for maximum performance and imagry.

The end result is... If you were to grab any PS4 multiplat, you could run it on similar PC hardware with similar imagry with similar performance today.

You need to look at things from more perspectives instead of your plain black and white view, there is so much more about the hardware, software,  performance and graphics than you probably realise.

500$ is a tough sell TBH. 400$-300$ is the sweet spot to get console to the consumers. So I am not sure how they are going to market Scorpio and get people interested in it. I know many people say they do not see difference between Xbone and PS4 game so downsampled game to 1080P TV is going to be impossible if they can't see the upscalling resolution.

It's a "Halo Product".
nVidia doesn't make the Titan graphics processor because they shift 10's of millions of those cards do they?
There is a point in having a higher premium product in your lineup, regardless of how it sells.
It is the product that gets used in your advertising, the product with the best possible experience, best possible graphics, best everything... And hopefully the product that is used when it comes time to be compared to the competition.

It could also open the doors for other consoles at other price points as well.

As an Xbox One owner... There is indeed a difference between the Xbox One and Playstation 4, whether it's substantual enough for people to care is another matter entirely.
It's certainly not the difference you got with the Playstation 2 and original Xbox though, but it's still enough that I am happy to ridicule the Xbox One more harshly than the Playstation 4, both of which are underpowered devices in my opinion.