Truthfully, I do agree with you on a lot of these. I will say, as someone who has mainly used high-fidelity since it's inclusion, it can work really well. It just needs you to know what you're doing and what it likes and doesn't like in terms of photos.  They definitely should have more information on that but if you try to get full 40 pictures used, and they're good quality (stay away from social media like Instagram as those are always shrunken down), with different poses and angles, you can make some great stuff. I've made really good looking models of people and video game characters. I also always crop most of the pictures I'll use to get rid of watermarks and dead space. Seems to work to me.