It's not like there are only two approaches - "Bo Peep" or "Take Charge".
There are many grades and combinations in between.
I agree!
Throughout all of my "tough stances" in my sitch, I maintained a "loving detachment" towards my wayward wife. Oh, we had our moments -- three or four real blow-ups -- but for the most part, we managed to keep things civil. I laid out some boundaries (no family finances used to enable your affair, no TMing or phoning OM from inside our home, no TMing or phoning OM in front of our sons, from ANYWHERE, if you're going to come home after 1am, don't bother coming home, etc.), and I must say, she respected them almost completely.
The "loving" part of "loving detachment" comes easier for you, trust me, when you maintain full intel ("snooping") and you hear and see the things that I heard and saw. But I did try to "shine a light back towards the marriage, even as I never wavered from my Main Boundary ("I will not live in an open marriage") and my sub-boundaries mentioned above. I would do occasional loving Acts of Service for my wife, such as pulling her car in the garage late at nite, or covering her with a blanket when she fell asleep on the couch, kissing her on the forehead, etc.
I believe that this "hybrid" approach -- aggressive confrontation & exposure, firm boundaries, cut off all financial enabling, strong legal stance; coupled with DBing principles such as GAL, "be the better option," 180s, etc. -- is what works best when there is active infidelity involved.
Reasonable people may disagree, but this is what worked for me, and this is also what I have seen work in my time on these boards, as well as my study of literally thousands of affairs.