If you can't make it, then Ticketmaster/whoever should be compelled to refund you, and then they can sell it again.
The fact that they are all selling out displays demand for these gigs so it won't hurt TM/LN. They want to be a monopoly, then they have to live with the consequences.
A Survey of the Ticket (Re)Selling Landscape · HackerTrans
The fact that they are all selling out displays demand for these gigs so it won't hurt TM/LN. They want to be a monopoly, then they have to live with the consequences.