I've never been able to tell the difference between a cheap trackpad and whatever Apple uses, but I hear folks go on about it endlessly.
My guess? Most people don't care, but the discussions are driven by the few who do, because for them, it's a really big deal, and they'll pay accordingly. Similarly for "My code is unreadable unless it's on a 4k display at 220+ PPI" -- I'm sure it's true for them, but for me, a crappy FHD display I can get for $100 is great for coding.
I'm like this with Linux...I pay System76 a premium because I care about how they go about building their systems, both hardware and software. To normal folks, it seems like a crazy thing to pay a premium for, but for me, it's a great deal.
Very interesting point, and substantiated by the fact that every windows laptop user I see in the wild carried a mouse around with them. They do not care about this issue much, clearly.