Some of the repair restrictions that Apple put in place, which Louis Rossman complains about, made more sense after reading about the repair fraud gangs that Apple has to deal with in https://www.cultofmac.com/581970/iphone-repair-fraud-cost-ch...
If they produced enough spare parts and sold them at reasonable cost it wouldn't be as worthwhile for those "gangs" to try to abuse the warranty system for parts.