>Concerts are like promotional events for their brand and many people buy albums, swag, post on social media about the event, and that's all beneficial to the artist.

This isn't true. These days, musicians make the vast majority of their money in touring, from both ticket sales and merchandise (t-shirts) at the venue. They don't make squat from album sales. Notice how many old 70s-80s-era classic rock bands are out there touring. They aren't selling brand-new CDs; they're making money with ticket sales. Come to think of it, this is likely why concert tickets are so much more expensive than they were decades ago.