Don't conflate "it's extremely obviously not legal" with "people don't like it" (the latter camp you can always ignore, they fundamentally can't do that much in most cases except not support you. See e.g. the whining about pretty much any digital mode ever). But encryption on ham bands falls in the first bucket, which is a problem, and I doubt that's simply a "we need to advocate for changing it" matter.

Fun fact: in parts of the world, you can transmit pretty much whatever you want on CB, nobody is stopping you from running encrypted digimodes there. And for slow transmissions, one can probably squeeze something through ISM bands, despite the limitations there.

And you probably could develop a good mode on ham bands that has the foundations and does signatures but not encryption, and can switch to encrypted on other bands.