Mildly Infuriating

I'm not being hostile, I just fail to understand how your point with multi phase standards has anything whatsoever to do with safety. Multiphase standards, and standard intercompatability are convenience issues, not safety issues, and therfore irrelevant to the discussion.

And other standards notably, explicitly do NOT include all those safety standards. For example, the ground pin on UK plugs is longer than the L and N, which A) can be used to place child safety shutters in every single outlet, that are lifted out of the way when the ground pin is inserted and B) in the same vein ensure that GND is always the first prong to make contact. The wiring of UK plugs also requires a some slack in the L and GND wires, so that if the cable is yankes so hard the wires tear out of the plug, L is always the first to go.

The internal fuse also allows you to safely use super thin gauge wiring on low power appliances, and allows you to create cheap, low power extension cords, that are still safe because they have a fuse in the plug (yes, in theory any country could do that, but resetable breakers are expensive, and replaceble fuses are inconvenient for the user, unless the contry already has a decades old standard surrounding them, and they're already available for sale basically everywhere).

If other plugs provide safe alternatives for the issues I’ve reiterated, shouldn’t we be looking at those plugs as safer alternatives?

No. Not unless the current plug is outright dangerous. Rewriting an entire countries electric code, and introducing an entirely new type of plug, especially one which would be neither forward nor backward compatable with the old one, costs billions, and is a major nuisance for consumers in the transition phase. It's simply not worth it, unless it's necessary for fundamental safety.