The tires and some types of brakes still emit micro plastics.
By the way this argumentation is great to sabotage any argument to keep the statusquo. When someone argues for a way better solution, tell why it's still not 100% perfect to make people to believe it has the same flaws than the previous state. Repeat until someone finds a 100% perfect solution (hint: there is never such a thing).
Exactly. The direction we need to head is obvious: Stop treating cities like wanna rural areas for poor people and turn them into actual cities, where everything is right there and travel isn't necessary – not by car, not by train, not by bike, not by anything.
But, indeed, a move from the status quo is uncomfortable, so we get silly things like "But, but, my bike is better than a car!", completely missing the forest for the trees.
Shoes have the same problem, except for some very expensive artisan brands. They may actually be worse per mile than biking.