I agree with your points that these were demanding tests and for those not doing that demanding of a task you don't need top end.
I did find the relative times to be of value.
I concluded I don't need to be in a rush to change my M1 laptop so to me that was useful. He mentioned that in the video.
I also concluded that buying a higher spec prior chip is also a good strategy.
In buying a higher spec "prior chip" (presumably anything M1-3) I think it depends on whether you are buying something that is still current, or something that is being discontinued or is reconditioned.
From what I observed in pricing, if it is still a current model they don't discount much on price. For instance, the Mac Studio M2 Ultra is still the current top of the line Studio. If they are asking close to $6 grand for it you are not likely to see it discounted very far if at all.
On the other hand, if you are interested in picking up a M1 Max MacBook Pro, you probably can find a significant discount somewhere in the reconditioned bin. Yet even there they can keep those higher end chips and higher memory relatively high compared to the base units so you could still; spend $3k plus for one of those.
You can really save money on the base level units. The question for me is whether I can do what I want with the base level unit or do I need something more. If I can do it all with the base level unit, as I have been able to do to this point, I can save my money to spend on lenses and other photo gear.
I also need to look to the future. Are the photo processing programs suddenly going to require more capacity to work correctly?
Also none of this applies to someone who is going to get heavily into video.
I took a look at video and that whole subject is way more complicated than still photography. I am both intimidated and engaged enough with still photography and I am not ready to start down the video trail. I guess when and if I ever get there I may have to make some new choices.
I would say, if you are seriously into video or thinking about getting into video the review we are talking about would be very informative for you.