That's a question only you can answer.
Do I need Advanced 4x4? Not me personally, it's easy enough to just push the dial where 4H is located. But it came with my sasquatch package so I have it. And to be honest, I'm not a huge fan of it. Just turning it on it engages. Hubs are locked, and you can feel the "pull" in the steering. I most likely won't use it much if at all.
So it really comes down to more of a want than a need.
Edit: To expand as I just noticed the same post from you in a different part of the forum. Adding rear locker (depending on model) for a Big Bend doesn't give you advanced 4x4, just different gears. I added that to the Bronco my BIL took (BB) just because I figured he'd use it to tow. The stock 3.73 gears will turn most tires fine. So unless you have a specific need for them, they aren't really that necessary.
2021 Broncos - BaseSquatch 4dr. Rapid Red V6 Soft Top
Big Bed 4dr. AMB V6 Soft Top Tow (BIL's)
Nitto tires SUCK! You've been warned.