I tend to found the way to use it vertically (Instagram, Snapchat, TikTok format) it works well with my thumb. And when horizontally, it is the more traditional index finger. But yes, on my full-size camera, when I use a grip it duplicates the buttons for better ergonomic controls. Personally, I'm happy to use my thumb and index finger, depending on orientation on a small device like a phone.I don't think it's as bad as the YouTubers make out, however, the position of the button isn't in the right position, it's a compromise between using it vertically and horizontally....however, as you've pointed out, it's great to snap a quick photo.