again, that’s a choice you made… you can make your own clothes out of linen and the tools to do it are more available to you because they’re not hand crafted, but you choose not to because you want to save time
heck, you can buy a shirt that’s 5x the price that will last but you choose the cheap shirt so you can have 5 of them
this is the same argument that we don’t build the coliseum any more and therefor we’re not as good at making concrete as ancient romans… modern society is built on engineering, and engineering doesn’t build things that lasts 2000 years that’s true, but that’s not what engineering is for
engineering isn’t about building bridges that don’t fall down: engineering is about building bridges that barely stand up so you can have more of them
the same goes with clothes… modern clothes aren’t made to last your entire life because they’d cost 5x more… people don’t actually want a shirt from their 20s when they’re 70 - people don’t even really want a shirt from their 20s when they’re 30! they want 5 shirts in their 20s and 5 more in their 30s, and they want to be unique and personal and they want to spend no time to acquire them
because we can pass packages in bulk between large distances… in routing, it’s always delivery boys: a single packet is a single packet: there’s no bulk delivery, except where you have eg a VPN packing multiple packets into a jumbo frame or something…
the comment you’re replying to is only providing an analogy: used to explain a single property by abstraction; not the entire thing
but that’s not at all how NAT works: its not specialising in delivery to private hosts and making it more efficient… it’s a layer of bureaucracy (like TURN servers and paperwork - the lookup tables and mapping) that adds complexity, not because it’s ideally necessary but just because of limitations in the data format
routers still route pretty much exactly the same in IPv6 direct or NAT, but just at the NAT layer public IP and port is remapped to internal addresses and ports: the routing is still exactly the same, but now your router has to do extra paperwork that’s only necessary because of the scheme used to address