I'm talking about the day to day things in our lives, has gone completely beyond any normal person's ability to repair, diagnose, or, really, understand at all.

A "normal" person's inability to understand or repair is limited by the lack of the literature, tools and parts - not because technology has "advanced". (To a lay person, any technology that they doesn't understand is akin to magic to them). And this is ignoring the glaring obvious - things are today being deliberately designed to be unrepairable because that's more profitable for company's like Apple that even lobby against any Right to Repair legislation. Remember, if they want these companies can design things to be easily repairable - e.g. concept https://frame.work/blog/introducing-the-framework-laptop