>This site allows you to mark, review, and print your ballot materials for return to your county elections office.

Their FAQ makes no mention of placing it in a ballot envelope. In fact they offer the ability to print your own from the website. Where are you getting that information?

It appears one can type in a name and dob, print a ballot, fill it out, and drop it off. What am I missing that is also not in their FAQ?

https://sos.oregon.gov/voting/Pages/instructions-disabilitie...

   Step 4: Return your Ballot

   After printing your marked ballot summary:  
   Enclose your ballot in the secrecy envelope.  
   Then place that envelope in the return identification envelope.
   Sign the ballot declaration and the return identification envelope

Is your theory simply that nobody in the Oregon Secretary of State's office thought people might try to cheat?

If that's the case why are they offering users the ability to print it out and return it if doing so requires a unique one time ballot envelope?

Visually impaired voters who can use a screen reader but may have trouble with the paper ballot. Voters with motor issues that make it difficult to fill in a bubble with a pen.

Here are the instructions for using the alternate ballot: https://sos.oregon.gov/voting/Pages/instructions-disabilitie...