Isn't this to a much greater extent UFW's fault? If it claims to manage the firewall for your system, I would expect it to manage all of iptables, not just one

Isn't this to a much greater extent UFW's fault? If it claims to manage the firewall for your system, I would expect it to manage all of iptables, not just one particular chain that it thinks is important. At the very least, I would expect it to signal when there are other chains configured in iptables that it can't/won't manager for you.