Yup, I have the same problem.
Password? Whatp password? Eventbrite lets you enter a mail address
that they don't verify. As you just discovered, if you give Eventbrite
the wrong address, you don't get the tickets so there is a strong
incentive to provide a real address. (Unless, I suppose, the tickets
are delivered in the web transaction and the mail is just a copy. I
haven't bought tix from them for a very long time and don't remember.)
I suppose they could verify the address by sending a test message you have
to click on, but there is a tradeoff: some fraction of people would give up
and not complete the transaction, so I can't really blame them.