That's invalid economic reasoning. Tickets are a monopoly market with a fixed supply. The monopolist (band/label) can issue tickets at whatever price they want, but once that price and quantity is set, additional resellers are only rent extracting, they are gouging consumer surplus and providing zero service in return - the exact same number of tickets are sold to the exact same show.
There are many legitimare reasons for a band to issue tickets bellow market clearing prices, i.e. leave some fans with money in their pockets even if they would be willing to pay more. For example, building a long term relation with their fan base, providing a good service for a "fair" price etc. Essentially it's a gift economy where people exchange more values than just money (trust, appreciation, artistic expression etc.); the scalper is throwing sand in that transaction by maximizing its own financial revenue.