*ok so i didnt read what everyone said but*
I have only BPs and I for the most part a hook is never needed. HOWEVER i have a mojave male that the hook i have makes it a good bit easier to deal with him. would i say i absolutely need it, no, but it makes it easier with that particular snake. If i go in with just my hands he tends to strike more but when using the hook he seems to always try to retreat instead of hold his ground. BTW he is the only BP i have that it is a benefit to use it with and one of two BPs i have ever seen that it was a "need" or "aid" to have.
I would say you dont need it, but if you get a snake who is very nippy it may come in handy. for the same reason it does for me.