#2. Saudi Arabia shows are the new WrestleMania for The Undertaker

Late 2018 in an out-of-character interview, The Undertaker revealed that he worked way too much in 2018. Given his age, even working one time a year seems to be true, but he seems to be fine otherwise.
In a sense, he's realized that it's smarter for him to work Saudi Arabia shows twice a year rather than WrestleMania, where he knows that his legacy will be tarnished the more he performs.
It works out well because it's a great payday on both occasions, so he's still earning millions for minimal appearances. In that sense, WWE may want to build the Saudi shows as his events, where he's featured as a special attraction.
In order to do that, Vince McMahon knows that he realistically has to protect The Undertaker and make his appearances an even bigger deal.