Just watched it. He goes into very good reasons as to why the memory is soldered, but then disregards those same reasons where storage is concerned. While you may not need super fast storage for storing photos of your kid's birthday party, if you want to do anything which requires data of the amount larger than your RAM (minus the operating system and ton of background processes running), then you need to be able to access it as fast as you are using it out of RAM. And while he says you can just stick in a PCIE NVME, you aren't going to do that on a small device and they come in many different speeds. Will the consumer buy the cheapest one and get something so slow that it results in a poor reflection on the company/product or a call to support? Probably. Fortunately, where the PS5 is concerned, most console players are tech kids who do their research, and even if they aren't, Sony has code in place to test the speed of add-on storage and warns you if it isn't "up to spec".
The video also focuses heavily on Apple. Apple computers are designed for users, not enthusiasts. I'd garner a guess that 90%+ of Apple users wouldn't dream of popping open their own hardware to try to upgrade it. It's also easy for him to just say "Increase the base system specs and don't make as much profit for shareholders", but Apple consumers pay the asking price, so they would be stupid to do so. Just putting out a video like this changes nothing. Only consumers can effect this kind of change.
And then there is the multiple tier product offerings. Again, it's easy to say offer more (and charge more), but Apple doesn't operate only in the West and many of our local brethren also don't have deep pockets. They would rather you buy the tier you can afford than buy something else. But producing and stocking of those different tiers is a costly endeavor. As I stated, though, if you are buying Apple and need the capabilities of the higher tiers, you are probably already part of the "cult" (<= used in the kindest way possible) and can afford it. Of course they will be happy to take more of the money you have already demonstrated that you don't care about.
That's not to say that Apple doesn't have some interesting technology. One of the things some models do very well, again thanks to things like unified system memory (soldered onto device) is AI applications. AI needs fast access to massive datasets, which is why they are typically relegated to VRAM and processed locally to the GPU. I.e. that data travels over the much slower PCIE bus only once when it is loaded onto the GPU and iterated over 1000's of times by the GPU's processor. With unified memory, there's no distinction between System RAM or graphics RAM. It's all very fast, with a large bus width, so the main processor has similar access to it as the GPU does to VRAM. Now the processors aren't as fast as the GPU for those kinds of tasks, but running local LLM's on a laptop is actually a thing with those, and with fairly acceptable speed.
This has gone a bit into wonky territory, but the technical details are important for certain tasks. It's very superficial to just yell "Greed!" and there is an element of that. It's just not as big a factor as most probably think.