The Yankees would have you believe that eliminating print-at-home tickets is entirely motivated by a desire to prevent fraud, but the reality is that it has everything to do with the teams partnership with Ticketmaster and ongoing war against StubHub.
When ticket resellers use StubHub, they can sell the ticket for as little as theyd like, but Ticketmaster sets artificial price floors that prevent sellers from listing tickets below face value. This practice has recently been called out by the New York Attorney General, as it deprives fans the opportunity to buy tickets on a fair market.
The Yankees wish to avoid the realities of supply and demand is the reason the team touts Ticketmaster as its official resale partner, and this new anti-PDF policy is a blatant attempt at further undercutting StubHub. The Yankees cant force anyone to use Ticketmaster instead of StubHub, but it can make using the latter a much bigger pain in the ass by eliminating printable tickets.