I sort of disagree with this: once I’ve internalized the gestures, I really appreciate the lack of UI for them. It’s like vim and emacs: the sparse ui creates a steeper learning curve but becomes a feature once you’ve learned the tool
It’s one thing to learn a few gestures that work consistently across the platform. But every app tends to do its own thing, and even if you are a power user of the respective apps and learn their idiosyncrasies, it’s still annoying that they all work in slightly or sometimes drastically different ways, and that they aren’t consistent in terms of discoverability.