I think we're saying the same thing except I'm splitting the blame from IPv6 (which was very much about adding more bits) and placing it on the unrelated hobby horses people like whats-his-name on Android ride in on. Intentionally not supporting DHCP in the new protocol had nothing to do with the design of IPv6, it's just something they prefer.

To put it from another perspective: If the situation was reversed would you be blaming IPv4 and saying IPv4 should have been designed differently or would you just be asking why this guy from Android doesn't want to add DHCPv4 when DHCPv6 is supported? In both situations it's not IPv4/IPv6 to blame for the inconvenience, it's the guy taking advantage of the transition between protocols to do something stupid at the same time. No amount of changing the definition of IP is going to make them like DHCP, they'll always push some SLAAC-like address assignment onto users. The only reason they didn't for IPv4 was they came in after it was already the way instead of before networks were deployed and they could force it.

It's often very difficult to use IPv6 in practice, but not because IPv6 made it that way.