only on a federal level. states like california or texas are more direct than a lot of western europe in some ways. like the fact that ballot props are binding law or sheriffs and state attorneys are elected.
I'm one of those everyones, and I don't agree.
Except if you mean local initiatives that don't concern 100M people, but e.g. some regional municipality. Of course then just the locals can vote, be they 100K or 1M.
I guess I could argue that putting a stop sign at a particular intersection in rural Kansas could concern me, even though I don't live in Kansas, but I think very few people would make that argument in good faith.