I think the person you replied to is saying that while the grade of macbooks is good (which normal people call quality), the quality of macbooks is not (ie, does what it says on the tin, and the keyboard lasts the life of the laptop).

It's the BMW argument. Great interior, power, handling. Feels like quality. Actual quality sucks because the thing needs more repairs than a Toyota.

https://www.brainbok.com/guide/pmp/study-notes/quality-vs-gr...