The domains help Stubhub obscure that they are involved
When there is an excess of tickets, they can make sure that their own stock sells before random fans tickets ('I'm sorry, nobody bought the ticket you listed for sale, and now the event is over').
By using Ticketmaster as an intermediary, artists are able to put artificial below-market prices on the tickets but then sell them at inflated prices, while deflecting fans' anger to the middle man. Ticketmaster, in turn, pays the artists a kickback and everybody wins (except the fans).
If you don't want to lie on the Whois, use a shell company or something.
If I sell lifted PS5s in a dark alley with a cheesy Ronald Reagan mask on, does the law say "hey, he didn't try that hard to deceive anyone."
The judge may go easier on you if there was no deception. The lawyer is just showing the judge whatever they can. Poster you replied to got it right.