Mara and Anakin weren’t resurrected though. Jacen didn’t even become a force ghost, he was lost forever.
But i do remember people saying if Denning was allowed to do it he would have had Luke cutting star destroyers in half with his lightsaber,lol.
Resurrection is a Sith power. They don’t respect life. Jedi respect the balance and that includes letting people pass on to join the force. At least that was well done in the prequels, one of the few things Lucas did well. The contrast between Yoda’s philosophy and Palpatine’s.
Its also one of the things i think Veitch got wrong for Dark Empire. Luke thought he could use the dark side to save his friends and remake the galaxy the way he wanted it to be. That is totally Anakin Skywalker, but not Luke. He would have ended up losing his friends, if not having to kill them and he would have ended up another Palpatine.
At least at the end of that story Leia pulls him out of this delusion.