Hey Sherman,
My statement regretfully remains true up to now. We do understand the benefits of AMP. However, integration might not be that simple. The best I could do as support staff is to add your feedback in our issue tracker.
Regarding:
My statement covers both non-technical and technical users. If your a non-technical user, you should use a third party plugin. If you’re technical, you can build an AMP version of your pages. I realized it would have been better if I elaborated that though and added “or consult with a third party developer”. The “build your own” part does not apply to you.
I respect your opinion that you would not have bought a theme if you know how to code. Not all developers prefer to code from scratch though especially if there are available time saving solutions. If there’s none, the “build your own” (for technical users) or "“consult with a third party developer” (for non-technical users) would be the alternative.
Regarding:
I’m not sure about your setup but I just tested an AMP for WP plugin (not a recommendation and only for demonstration) and it works. You can see my test at https://youtu.be/y75DO0cNN4Y. Please just note again that this is only for demonstration. I’m just showing here that the Cornerstone shortcodes work in AMP contrary to your statement.
We do not have support for AMP related topics. Maybe you can post in our Peer To Peer Forum to see if there are AMP experienced users.
Regarding:
WordPress does not require themes to have an AMP version. And, I’ll repeat here that it is not that simple to integrate AMP. This does not mean that our development team neglects AMP. This just means that it might take some time. Maybe a lot of time. We couldn’t tell.
I hope that answers your concerns and I hope you understand our current position on this.