No, they've always been at that price if you're patient and wait. in addition to Apple systems, I've bought numerous 30x0 cards, RTX5000 and RTX8000 as well as i-CPUs and Xeon Platinums, also full Dell Precision systems since the chip shortage started and I've never paid more than retail. With Dell I'm still at 40%+ discount over retail as usual. Then again, I'm buying six-figure in hardware every year and every few years seven/eight-figure for upgrading GPU clusters.
It's clear as an Apple fanboy you're butt hurt and trying to spin things in Apples direction, that's why I picked the GPU as an example. Your other numbers are off as well, 12900k for example is under $700. Again, want it right now, that MBP is $10k.
You don't even need a 3090 to beat M1 Max, depending on what you do. It has a high fill rate for video/photo work, GP computing not so much, a 3060 is enough to beat it there.
That's why I buy things for what I need them. I'm not brand loyal. I've used Macs back in the 80s and as primary drivers since the G4 days and today I use my Macs for video/photo work and Linux + Nvidia for research, Windows + Nvidia for a game if I manage to find the time. Writing/publishing I do with Latex which works anywhere and doesn't come with an advantage of one system vs. the other. I happen to like Keynote more than Power Point, so all my slides I create for teaching my students at the university are done in Keynote. Conference presentations depends, there are rules to follow. And the moral of the story is, things are not as black and white as the Apple sheep make it out to be. There isn't one best system, it all depends on the use case.