I think you’re right, the abuser will probably get mad if the status quo he likes is interfered with. We just don’t know if the abuse has been (or will be) physical. If there’s a serious threat of physical abuse, then one of those loving limits is to very clearly promise that legal authorities will be called in if any such thing happens.
I’ve seen it happen where the abused gets stronger and it prompts the abuser to initiate the leaving. And rarely, but sometimes, the abuser changes.
It never ceases to amaze me that these men are able to find spouses. I wonder if longer engagements can help prevent this for some, although, these people are often good at hiding their faults. It’s heartbreaking.