I see bunched buses on the stop right outside my work basically every day. Sometimes four from one route and another three from another parallel route all within a ~5 minute span.
Mercer in Seattle is... not great for traffic.
That's another thing.
The faster bus skipping stops where people are waiting, so they can be picked up by the next bus does work; I've seen it in action.
Most bus stops I have used in the US dont have covered shelters or enough space for passengers to wait outside of the elements. Usually this means sitting under the overhang of a nearby business. If the bus doesn't want to stop for whatever reason and blows by, it sucks.
Maybe a better future would be a public bus app or button at the stop that I can press to say I am waiting, but until that day, they should stop.