I don't think it's appropriate to consider bicycles as "first-class vehicles" in all situations, namely in the dangerous situations you list (speed limits >~25mph, multiple automobile lanes, etc.).
Driving a motor vehicle on a road is a privilege. This privilege is represented by a motor vehicle operator's license, which may be revoked by the state for a variety of reasons.
Riding a bicycle on a non-Interstate public road is a right. If this clashes with driving habits, driving habits need to yield.
Driving a motor vehicle on a road is a privilege. This privilege is represented by a motor vehicle operator's license, which may be revoked by the state for a variety of reasons.
Riding a bicycle on a non-Interstate public road is a right. If this clashes with driving habits, driving habits need to yield.