If sidewalks could be wider it wouldn't be as much of a concern. Narrow sidewalks are to accommodate car parking more often than not. I would rather see less of that in a city centre.
That you know these bikes and scooters blocking pavements is a social ill but you do not care because it is convenient for a fraction of a percent of commuters
Had a motorcycle accident. Completely pulverized. ICU for a week. Got out and was driven everywhere for a while, but when I walked these were not a substantial burden.