Over here (Finland, like all of Europe) we have roads, we have bike paths, and we have pedestrian pavements. E-scooters are always good for bike paths, and if they move faster than 15 km/h, they are not to be ridden in pedestrian areas, only bike paths, even if they are not exactly bikes.
If there is a road, a bike path and a pavement, each group has their own lane. If there's only a road, everyone uses it, with pedestrians on the side and bikes next.
If there's a road and a pavement, then pedestrians and slow e-scooters use pavement and bicycles and fast e-scooters use the road.
If there is only road and bike path, motor vehicles use the road and everyone else uses the bike path, with pedestrians on the side.
I do agree what you say about music blasting mopeds...