I have been lifting for 6 years (non professionally) yet never seriously tried the Deadlift exercise.
Is this exercise necessary for intermediate\advanced bodybuilders in any way?
The deadlift is awesome
I find deadlifts very productive. Since they're a multi-joint, multi-muscle exercise, they promote growth across the entire back and legs. Done heavy, I've found them very efficient at adding muscle. This is partially because I am a novice. It might be different for your situation.
I don't know of many exercises that could be said to fully replace the deadlift. Squats? Romanian deadlifts? Barbell hip thrusts? They're all close, but not quite it.
You should deadlift
Since the deadlift is easy to learn, safe if done correctly, and simple to do heavy, I think you would love deadlifting. Start light and add weight frequently.