Unless you are a competitive lifter who needs to be really strong on a few select lifts there are no "necessary/mandatory" lifts.
So can you get big and strong without training the deadlift? Sure! But you will have to select exercises to strengthen muscle groups that will lack from the removal of deadlifts.
Now regarding the topic of SOME powerlifters rarely training the deadlift... this is mostly relating to those following a Westside-influenced system in which there is one ME lower body lift per week either a squat OR a deadlift OR a goodmorning. So the deadlift is at best in 1/3rd of the workouts.
I can work for powerlifters who A) squat with a style that uses the same muscle groups as the deadlift (e.g. the style used by a lot of heavily geared powerlifters is basically a hip/lower back lift as opposed to raw squattes who tend to use more of a quads-dominant style) and B) who do tons of assistance work for the posterior chain.
Look at raw powerlifters (Green, Duffin, etc.) they tend to have larger quads than those using gear. These people using a hips dominant squat will actually have a stronger transfer from training the squat to the deadlift. Not so much for those who use a more quads-dominant squatting style. The later will thus need to train the deadlift more often for it to do up.
Lifters with a strong grip also do not need to train the deadlift as often. Those without a naturally strong grip might need to practice pulling big weights more often to be good on the platform.
But if your goal is just to get overall muscular and strong, the deadlift can be replaced or done infrequently. The job might be a bit harder (at least for the strength part) but it is doable. In fact I would say that a majority of bodybuilders do not deadlift.
But make sure that the back and posterior chain get enough heavy work to compensate.