Not sure what you are saying (or just ranting?) - MBP speaker are the opposite as in the rest of non-apple Laptops have way better sounding speakers? That is definetely not my experience at all.
If they are all rubish together, well, they are laptop speakers - and as such you have to treat them. Still there is nothing preventing some set of laptop speakers being objectively better than others.
They're saying that the physical speakers inside the MacBooks body are not what makes them sound good (and that the physical speakers are on par with other manufacturers) — it's the fancy, custom post-processing that does.
2Quote from their own link: "In the case of Apple Silicon machines, Apple has taken things one step further by including actually good speakers on most modern Macs"