Why do you limit this to Apple? Samsung and Sony will take extra care to apply the glue properly when fixing your phone, and they will replace your device if their glue fails to do its job.
I never seen Samsung fanboys inventing fantastic stories to defend their brand. Where with Apple I seen tons, remember the issue with the keyboards ? I seen here an HN people accusing users that they are slobs, or trolls and that the keyboard is perfect, one fanboys was creating a fantasy where Apple had a giant lab with mechanical robot hands typing on a keyboard simulating real world usage and there is no way Apple did a mistake. (where are you naive Apple fanboy that things robotic people are typing on hundreds of keyboards so Apple can release perfect stuff???)
When Samsung or Google phones have issue I never see such fantasies beeing created to defend a giant company that has payed people to do that.
Why are they doing it?