Why ?
Because they are selling everything they can make !
And every sale made now is money on the books and a sale AMD and Apple (also TSMC) don't have a chance at later.
It'll be more capable than something you can't get.
At the rate this year is going it may be the best graphics driving platform available for purchase new in many outlets for a while.
For some reason Intel fans will buy anything they release even if it is totally meaningless. I have no idea why, but I have no idea why a lot of things have happened in the last few years... Why would anyone think that Trump was actually intelligent when he told the universities he attended if they released his transcripts he would sue them... If he's so smart and got good grades it makes no sense, especially for someone who brags about everything... Common sense says he doesn't want people to see he barely scraped by with crap grades and his family money bought his degree. Trump says he's smart and his followers believe him based on no facts... In the same respect Intel fans buy anything Intel releases based on the same exact mental outlook... Intel says its good so it has to be and I need to buy it because Intel told me to buy it. I hate being political, but its the best analogy I could come up with.
The 10900KS makes no sense when common sense should dictate that the 11900K will destroy it in single core performance and its release is just around the corner, and no matter how high you overclock the 10900KS your not going to change its IPC or core count so it will always be destroyed by the Ryzen 9 5900X in multi-core workloads. The 10900KS will not be able to compete against Intel's own 11900K (basically releasing in the same quarter) in single core and will be absolutely decimated in multi-core workloads by its main competitor (R9 5900X). Its a meaningless processor that makes no sense other than Intel says its good so everyone be good fanatics and buy it. Intel's earning reports clearly show that even though their very best was outright dominated by Zen 3 Intel still made more money than AMD did.
As meaningless as I think the 11900K will be it at least has a purpose, it may be able to regain the "gaming crown". From early benchmarks I'm not overly impressed with the 11900K as in single core benchmarks it matches my 5900X in some benchmarks, outperforms it in a couple not really reliable benchmarks (ones that most take with a grain of salt- CPU-Z benchmark, ect...) and gets beaten by my 5900X in more intensive longer running benchmarks. Only time will tell as the leaks we have to go on may be engineering samples, however a lot of what I have seen is showing clock speeds on the 11900K of 5.3Ghz which will more than likely be the boost frequency of the retail components. The 11900K may retake the "gaming crown" but from what I have seen Zen 3 still has an IPC advantage. The 11900K has to run at 5.3Ghz to compete against Zen 3 parts running around 300Mhz slower (5Ghz). So we have Intel 11th gen matching the single core performance of Zen 3 (relying on simple brute force clock speed, higher power utilization and higher thermal issues), while being absolutely destroyed by Zen 3 in multi-core performance. Still if 11900K outperforms Zen 3 by 2 -5% in single core tasks / gaming it is still relevant, it may only get 5FPS better performance in gaming but it can at the very least claim that and is therefore relevant. The 10900KS won't be able to claim single core or multi core advantages and is really just a meaningless release to fleece money from its loyal fans.