Once more, this is a conflict between the user's perspective versus the maintainer's perspective; To the maintainer disabling this ability makes sense, as package updates in Tumbleweed are considered whole new OS snapshots. To the end user, enabling it makes sense as they expect whatever daily updates the OS has to pop up in the system tray and be easy to install with the click of a button.

With my suggestion I don't see why this would be a risk in any form: I'm only proposing that the Plasma applet pops up a console on its own, which can additionally tell the applet to clear its notifications once the updates have been installed (that is the biggest annoyance to doing it manually). The user sees the same warnings and confirms the distribution upgrade the same way, there shouldn't be any added risk with this approach.