This is totally true and points to why Calibre's feature adds value. However I think the big players see exactly what you see and are scrambling to become peoples' go-to first. I believe this is for two main reasons. The first is because it's the only way they know how to win, and they don't see any option other than winning. The second is that they want the data that comes with it so they can monetize it. People switching to local models has a chance to take all that away, so cloud providers are doing everything they can to make their models easier to use and more integrated.