Apple is selling you exactly what they use to repair their machines. If Apple shares all of the tools/parts/manuals they use to do component level repairs, the result is NULL.
This isn't anything limited to Apple, or even computers. For just about any OEM repair process for nearly any product, there's someone who will do a repair with a higher labor cost and lower parts cost. That doesn't mean it's a reasonable process for a business at scale.
This isn't anything limited to Apple, or even computers. For just about any OEM repair process for nearly any product, there's someone who will do a repair with a higher labor cost and lower parts cost. That doesn't mean it's a reasonable process for a business at scale.