Tormod’s Crypt also makes sure the risk your taking playing yawg’s will doesn’t pay off to begin with; Tormod’s Crypt is a very common card in a lot of people’s meta. I find Yawg’s will doesn’t synergize with the vast majority of standard oath builds, which is why it is not included.
If nothing else, this is a strong reason to play YawgWill... Yawgmoth's Will can serve two functions depending upon the build
1: It can provide a means of gaining huge tempo boosts late in the game if both decks have been stalling the other... Maybe this means playing back a countered/destroyed oath, orchard, some BS etc... Regardless, it definately serves a strong late game function which is VASTLY outweighed by the fact that you donj't want to see it too early (as a 1 of this is also pretty rare).
2: In Tyrant builds, YawgWill can serve as an alternate win condition... Sure, the primary one is and probably should be tyrant lock/beat down if for no other reason than ensureing that something doesn't go wrong. In the case that something does go wrong then you have your alternate win condition and can probably win that turn after they've exhausted their resources to remove your Tyrants.
Now lets consider your scenario of Tormod's Crypts... This means that the opponent is siding out 4 cards to bring in 4 cards that will hate against 1... The one card that it is hating out either serves as a means of gaining tempo during the late game or as a secondary win condition... With the inclusion of Crypt, now the opponent has less cards that will serve a critical role in the late game, is still vulnerable to the primary win condition, and in effect crypt serves no other purpose than to hate out Will which makes it a 4-1 trade off for something that isn't essential (removing krosan reclamation may be annoying but hopefully you won't oath that far).
As a side note, however, just because Will isn't essential doesn't mean that it isn't incredibly valuable to the deck... This is why it is such a great card... It serves a vastly different function than any other card in the deck and provides versatility while not truly hindering the deck in any way... Thus hate designed to beat it will miss the other cards and, in the case, everything else is hated out then Will can still function and win you the game...