Unfortunately this isn't good enough to disrupt what those bulk buyers are doing from selling at higher prices, since most venues only care for selling out.
Scalpers only make profit if they sell all of their tickets. Therefore if the event sold out through illegitimate means, it would at least be
close to selling out through legitimate means.
The first person to approach them for remaining tickets, they'll be selling the remaining seats and usually some of these venues, even tend to make a deal with these sellers for some profit going towards the venue (there were few cases).
I can see that potential issue, yes. Hopefully with more awareness of blockchain technology this would become more frowned upon.
Also in terms of privacy, most venues that I've attended, didn't require any verification processes (besides showing the ticket), so a little advantage only (for places that require).
True, but proving that you actually personally own the ticket and bought it firsthand does require verification processes. The festival Glastonbury, for example, requires people to give passport photos and more to prove their identity months before the event so that they can avoid scalpers themselves, but blockchain technology can make this so much easier.