You can think of it as buying yourself more free time to do things other that dealing with computers. One of the things in the union contract is literally the ability to buy yourself
another month of vacation in addition to those twenty something days you get by default.
It makes even more sense if you take having children into account. I want to play dark souls with my son more than I want to deal with some css, form validation or api integration bullshit. Once he grows up, I will never have this moment back.