So we're supposed to do things wrong forever because some router vendors are too incompetent to set a firewall as well as NAT? That doesn't seem like a good approach to me.
Right and wrong in this context is subjective there are many things in IPv6 that I find to be wrong convoluted and overly complex
When IPv6 was created they had the opportunity to just make it an expansion of the IPv4 space they chose not to do that and instead they added in a bunch of wish list items that were not needed to accomplish the goal that they were seeking to do which was prevent the exhaustion of IPv4 addresses
Absent address space exhaustion I massively prefer working with IPv4 than I do IPv6
When IPv6 was created they had the opportunity to just make it an expansion of the IPv4 space they chose not to do that and instead they added in a bunch of wish list items that were not needed to accomplish the goal that they were seeking to do which was prevent the exhaustion of IPv4 addresses
Absent address space exhaustion I massively prefer working with IPv4 than I do IPv6