why doesn't anyone else learn instant transmission

#WHY DOESN'T ANYONE ELSE LEARN INSTANT TRANSMISSION MOVIE#

Dragon Ball Super would have Dsypo, one of the fastest warriors from Universe 11, reveal that he was similarly fast enough to anticipate Goku's movements while he used Instant Transmission, setting a precedent that Whis - Dyspo's apparent superior, given his divine status - is able to do the same and move out of Gogeta's way in the Dragon Ball Super movie.

#WHY DOESN'T ANYONE ELSE LEARN INSTANT TRANSMISSION MOVIE#

Instant Transmission doesn't make one completely intangible, with the 1992 movie Dragon Ball Z: The Return of Cooler showing that the metallic villain was capable of pursuing Goku through Instant Transmission, grabbing him and throwing him out of his teleportation state.

Fans are divided on two things about this moment: whether it demonstrates that Whis is so attuned to his own constant state of Ultra Instinct that he can sense individuals teleporting around him, or if his cosmic awareness senses Gogeta's Instant Transmission, allowing him to anticipate the warrior's arrival and dodge accordingly. Gogeta appears to use Instant Transmission to teleport himself to the confrontation, with Whis apparently sensing the Saiyan warrior incoming and moving out of the way. The moment from the film that has fans divided comes after Gogeta, finally formed, arrives on the battlefield for a showdown against Broly. Fortunately for the Z Fighters, Whis is perfectly capable of facing Broly and keeping him occupied on his own, with the Legendary Super Saiyan unable to land a single blow on the angel as he glides around every incoming attack without visibly straining himself. This rampage includes Whis, while Goku and Piccolo teach Vegeta the Fusion Dance so they can form Gogeta to stop Broly once and for all. As the enraged Broly loses control over the course of the film following Frieza murdering his father Paragus and blaming it on Broly's duel with Goku and Vegeta, the Legendary Super Saiyan attacks everyone in the immediate vicinity.

Why doesn't anyone else learn instant transmission