It's true that you won't get CGNAT without having CGNAT. Depending on your concern, it is possible to NAT66 to make your entire network appear as one IP.
I’d love to pay my ISP to rotate my ipv6 subnet every week. It’s not an option. My comcast IP changes every so often and that’s of some value.
It’s very unclear to me why people should be able to deterministic reach out to a specific device on my network. It has no value to me unless I run a service.
Then the value is clear, isn't it? The value is that it gives you the ability to run a service. Maybe you don't want to do that today, which is fine -- you can simply not make use of the ability. If you ever change your mind, it's available and you can use it.
Also... the ability for people to deterministically reach out to a specific device on your network is the exact same ability you use to deterministically reach out to specific devices on their networks, just viewed from the opposite side. If the Internet wasn't a place where people could decide to run services on their networks and connect to services that other people ran on their networks, what would the point even be?
IPv6 supports customer-controlled prefix rotation. You can select how often it happens by configuring your router to periodically change its DUID. Of course, your ISP can ignore this signal and always assign the same prefix anyway, but you can hardly blame that on IPv6.
