If you insist that getting a good CPU is all required for a good editing experience, the above footage shows an editor using a 13900K unable to edit his 4K60 footage without GPU acceleration. Such cases are common, and this also debunks your claims that GPU acceleration in video editing is insignificant.
As emphasized, this is due to not using GPU acceleration, and there's zero chance of getting away with it when dealing with such high-bitrate 4K60 footage. You cannot smoothly edit non-raw 4K60-level videos without GPU acceleration, even with a proxy, regardless of having a CPU like the 13900K or 14900K. The main concern is the hardware, software, and codec compatibility supported by GPU acceleration, presuming that one already has a decent CPU.
Something from the 12th generation with 8 p-cores is more than enough. From this point onwards, utilizing hardware acceleration support will ultimately be the deciding factor, which is why you need a GPU with a wide compatibility of codecs in hardware acceleration for video editing. This also doesn't mean you get the most expensive GPU.
If you insist that the CPU is everything and that anything less than the 14900K is considered scrimping, it is already proven that it doesn't provide any significant benefit over the 14700K and costs much more. Thus, it is nowhere near the territory of 'scrimping,' but more of making an informed decision because nobody would want to pay more without significant benefit.
Lastly, your concern with compression has nothing to do with the editing stage. Nobody stops you from using CPU export if you have all the time and want a smaller file size, but you don't need a 14900K for that sole purpose. A 14700K doesn't have significant differences in export time. Plus, if time is such a huge concern, use GPU to export it.
Your insistence on requiring the absolute highest-end CPU isn't valid, as any high-end CPU from the past 2-3 generations can do the job just fine. At a higher level of editing, you can no longer rely solely on CPU power and must tap into GPU acceleration. Most editors are just like the one shown in the video, and only after stepping into higher levels of editing are they forced to learn the benefits and importance of hardware acceleration.
In other words, you can buy a better CPU to cure stupidity, but it only works until a certain point.
View attachment 47828