People claim this all the time, but every time I push I discover they have no clue how networks work and just handwave away as "easy" or "details" the very reasons people who understand networks say it can't work.
Obviously. Anyone who does understand how networks work aren't going to spend any time talking about it. People don't talk about things they are certain about. They talk about what they don't know much about to feel out what they're missing. You will never find a discussion where pushing back reveals that you found the world's utmost expert. The world's utmost expert is bored with the subject and has moved on to talking about the things he has gaps in.
Not even by choice, mind you, but they naturally cement themselves in my mind over time as I work on systems because they're just that basic.
IPv6, on the other hand, I have literally one memorized (::1), likely because it's even shorter than a typical IPv4 address.
The people who have to make networks work need to know how IPv6 works - but there is no getting around that - they know how IPv4 works too.
Listen here, if there is a networking technology or feature that I wasn't forced learn when I half-assed a SOHO router config in 2005, then it shouldn't exist at all.