He just told you - it benefits people who want to pay more but would otherwise have to rely on luck to buy the tickets - this is the entire reason the system works.
Where I come from we call these "better seats" or "VIP passes" and they are sold directly through a venue. Not through middlemen that only add value through the scarcity they create.
Well it probably does make sense for PR reasons. Nobody wants to be the band/team/event gouging their fans.
Yes and this is why they exist :)
And nothing stops those people from buying a ticket from someone who is no longer able to attend on StubHub. Bands aren't putting on a show so that their wealthiest fans can attend.
And the difference between that and scalping to the buyer is ? If you can't bid on the price you're still relying on luck to get it which sucks if you want to pay more. So your argument was that only scalpers benefit - people who can now secure tickets at a markup also benefited.
Automated bots/teams of people buying many tickets purely for the sake of profit doesn't benefit anyone other than the scalpers.