Texas runs a 4-3, so drafting him involves projecting him to do things that aren't on film. You could see him maybe in the JACK role that Galette is slated to fill. He also might project to LDE in the 3-4, the JJ Watt role that Cam Jordan is slotted for.
So it's not a precise need fit. But I mean, if he's a potential pro bowler, I don't think you turn that down just to roll the dice on Galette. Besides, on a rookie deal for 4 years, you can afford to have both simultaneously if he really is the best available.