Sure, why don't you buy these figure out how to do it then publish easy to understand instructions for the average purchaser to follow. Thanks!
Without specialization and trust, there would be no economy, and humanity would be immeasurably worse off.
It's ugly, it's error-prone, and the software that attempts to simplify it doesn't and is of unknown trustworthiness. A very unhappy path.
Absolutely not a reasonable option for the typical user, and an even less reasonable expectation that they should do it or should have known to.