You are assuming they are bad quality? On what basis?
Apple has high standards as they have not put on LG as a 2nd OLED supplier due to issues. Why would Apple suddenly accept substandard displays from China... for all we know they may end up being the same as Samsung’s.
so much for "high standards"..have you by any chance owned a newer Macbook with that god awful flawed keyboard? I'm sure they "aggressively" tested those keyboard too and it certainly passed their high standard..(as I'm writing this I'm on 3rd KB replacement/repair and guess what after 1 week same problem again..I gave up).
back to the display...,in case you don't know display technology specially OLED is very sensitive technology and relatively new and exclusive.it requires alot of experience and patents and knowhow.
Samsung is the go to brand,they simply are the best,everyone knows that.
LG also makes good ones but they specialize in larger ones.
then from nowhere this cheap,Chinese brand BOE comes out and you think they will match the quality and expertise of Samsung OLED? no way! why no one else is using their OLED panels?
in case you are not aware,Apple in the past had inconsitency and quality difference between different panels they put in same model of their laptops,I've seen that with my own eyes.
if you browse this forum,people were trying to find out which panel their laptop had (Samsung or LG) by doing weird things such as serial number comparing/guessing etc and relying on "panel lottery".
all of those passed Apple's so called "high standard" too but certain characteristics and qualities are simply different between brands and can never be the same.