But repairability isn't only about the components being accessible (the glue holding in the battery is an absolute nightmare). It is also about the availability of authentic parts.

Historically, Apple made sourcing genuine parts an impossible feat. This potentially wouldn't even be a problem, if Apple didn't go to such great lengths to detect "non authentic parts". They changed that somewhat, but only for private consumers. Their model for their repair/replacement parts program still makes it borderline impossible to operate an independent repair service business, effectively protecting Apple from any competition.