I don't disagree. My problem is not with their choice of monetizing sync. My problem is with their choice to package a web app for Android and desktop, provide that same web app for self hosting, but not allow you to store the data in the web app. In the discussions on GitHub they claim it's just something they can't tackle right now, or whatever. No. It's functionality that was specifically stripped because that's how every other self hosted web app works and the local storage framework they use is obviously bolted on and not well supported by browsers. In other words, they're manufacturing problems to sell you a solution.
And again, that's their decision to make. It just doesn't seem like they make good decisions, and we're talking about an app you put a lot of work and data into.