"Passing laws requires getting other people to vote on them, which in practice requires mobilizing groups interested in the topic, which in turn requires gettin

"Passing laws requires getting other people to vote on them, which in practice requires mobilizing groups interested in the topic, which in turn requires getting attention on the issue, which in turn is often served by introducing bills on the issue, even if those don't pass." Actually, in practice, it happens exactly the other way around. IE you get support first, then introduce the bill.