If you don't Microsoft, one of the wealthiest corporations in existence, will steal your copy of minecraft that you purchased elsewhere.
Sorry if this isn't on topic, I'm very salty over the migration.
A valve radio had ~50 discrete components[1]. The first semiconductors had triple that number of components in a square millimeter in 1971[2], a modern CPU is in the tens or hundreds of millions of transistors per square millimetre. That's more components than the Encyclopedia Britannica had words in 29 volumes[3]. How are you going to 'know what you're buying' if you don't know anything about the bit which makes up most of the complexity and does most of the work? How are 'people' going to know anything about the CPU by getting lumbered a dozen bookshelves worth of schematics?
[1] One 1960s valve radio schematic found from Google: https://1.bp.blogspot.com/-Is9qxCCu2S8/VmZ44qHP1nI/AAAAAAABQ...
[2] https://en.wikipedia.org/wiki/Transistor_count#Transistor_co...
[3] https://patricktreardon.com/wp-content/uploads/2016/06/Encyc...
Even a fairly old ARM based CPU such as in the Pi 4, has billions of transistors. And miles of wiring.
But that's still a different argument to the one I was responding to which was "People have a right to know what they're buying" - and the claim that products are "not too complex" for that. At the point we turn it to a diagram which says "fuse connects to System-on-Chip blob ground pin 0 and data pin 7. Button board connects to blob ground pin 0 data pin 8" are we any closer to "knowing what we're buying" in a meaningful way?
People have a right to know what they're buying. Companies are testing legal and cultural boundaries, silently changing functionality and usability by altering software or access to required services after sale.
It's not "too complex", it'd just be a hassle if people knew.