Mainly because it’s shaped like a snow plow and won’t care if anything soft is in its way.

Passing two bikes requires moving over more. If you pass two bikes with the same manoeuvre you use for passing one with enough space, you’ll be far too close to the outer bike.

Are you really arguing that passing two bikes is the same maneuver as passing one? That second bike isn’t going to like it.

Containers are the ultimate “works for me” in software development. My experience it makes for more fragile software that depends on its environment being perfect and nothing else will do.