I've had many of these concerns about AMP myself and have seen other posts on this before. I tend to agree with their points. If you want to optimize your mobile view, than you can do that without a Google pseudo-standard. When someone clicks on a link to your site, they should go to your site.

This wouldn't be that big a deal if Google didn't emphasize the rank of AMP pages. There aren't a lot of alternatives out there to search, and Google dominates the market in much of the world.