Earlier quoted context omitted.
It doesn't work like that. Most PC "manufacturers" (including Apple) don't make PCs, and they all use the same Taiwanese OEMs/ODMs and Chinese factories. The main ones are Quanta, Compal, Pegatron (spun out of Asus), Foxconn (Hon Hai), Wistron (spun out of Acer), Inventec etc. Quanta is probably the biggest notebook manufacturer, followed by Compal and Pegatron. Compal and Pegatron probably have the best quality over…
I don't think it's so simple. Sure, Apple makes laptops at the same places as Dell or Lenovo. But I can't imagine Apple releasing, as Dell as, multiple product lines with a glaring quality defect (coil whine). Or consistently using cheaper IPS displays with backlight bleed and PWM like Lenovo. Apple's laptops aren't defect free by any means (e.g. anti glare coating rubbing off, paint rubbing off on the black polycarb…
Last laptop I bought was maybe 3 years ago. I was comparing everything at the local Microcenter and wanted something fairly powerful but not to the point that I was paying a hefty premium for that last "tier" of polish and quality. By sorting the options to include only i7, at least 16GB RAM, dedicated GPU, and at least 1920x1080 display, I was left with some silly Asus that looked like a Michael Bay Transformer, another Asus with a tasteful aluminum chassis, and a Macbook Pro.
The black thing with red LED lighting was out because I guess I am still a bit shallow and superficial. The other Asus had a better GPU, lower quality TN display, and spinning HDD in comparison to the lower-end GPU, nicer IPS display and SSD on the MBP. But the aluminum Asus cost $999 and the MBP was $2399.
I wouldn't have minded buying an Apple notebook if there had been a more affordable option with similar tradeoffs but as you say, they don't make ones like that. And I'd certainly like a nicer screen but not for more than double the price. A SSD was easy enough to swap into the Asus and when I upgraded the one in my desktop, I passed that older SSD down to the laptop.
I guess the main point is that these other OEMs like Asus still do decent sales and produce options with less-than-top-tier parts because there's a real market for those who are fine buying an Accord instead of a Mercedes even if the Mercedes has some superior features or build. Not sure how much of it is artificial (as far as intentionally targeting different price brackets with parts that may only cost the OEM $100-200 less to include).
Either way, as my current budget stands, I'll continue to gravitate toward whatever company can sell me "not quite the best" for half the cost of the top tier.