Washington votes entirely by mail with the postal system handling out going and drop boxes and postal system handling incoming. The county generally knows how many adults live there and can just figure most adults are eligible voters.
You can register separately or when you get your id. If you are indigent the same place that gives you food stamps and medical insurance whether you have an address or not gives you a coupon for a $5 state ID.
No idea why it's $5 rather than zero under the circumstances and others may have challenges as far as coming in from out of state or needing multiple documents to establish identity especially married and divorced women who changed their name but generally people are pretty well served
Do you have any contrary evidence that is non proprietary all I could find were proprietary reports and reporting on them that agreed with me. On the other side of the coin is you yelling angrily which is... not an argument