[zahlman]

Because there has to be a place where the bus stop could sensibly be. A history of car-centric design often eliminates those opportunities.

[alamortsubite]

I see. I think you're talking about stop placement on a higher level? Removing street parking can free up room for lots of extra stops, which can help with bus bunching: https://en.wikipedia.org/wiki/Bus_bunching

[zahlman]

I'm talking about what you physically see, or even step over, at the actual physical location where you're contemplating putting the bus stop; which is there because people were only thinking about cars when doing the zoning and construction.