If the premise - BS need to see similar effort as shown for the A - remained the same, but what need to be shown was different, would the concerns be the same?
If, for instance, the WS had a job wherein they normally traveled often. BS never really asked where they were going because BS knew it was the norm for their job and trusted them. Now, WS meets their new shmoozie unicorn, who happens to tell them the absolute most best thing in the world the love to do is travel and AP so wishes they could experience the wonderfulness of travel together, you know, because they have such a special thing. So, oldtruck's wife spends her days and evenings planning (scheming) various trips to satisfy her new wanderlust bf, and tells oldtruck that each of those "work related" trips are nothing but boring, stay in a motel, retched business trip.
Now, oldtruck himself loves the idea of travel. Would love to have had his wife plan jaunts here and there and everywhere to be with him on terrific romantic outings....just the two of them. But, alas, life such as it is, he understands that to expect this is not so reasonable. And she travels so much already for these often boring business trips. He knows, life is what it is. And lives with he rare week vacation to wherever.
Until.......dday! In which what oldtruck finds out is that WW has spent much of her so called work time on her computer instead, planning dreamy dream unicorn travels with her new AP. Cutting to the chase, the gig is up, she WS has been outed, the days and weeks and months pass over the trauma of the infidelity..........and then......oldtruck realizes what he really needs from his WW is that she spends as much time and energy and interest in planning travel and jaunts and trips with him as often as she did with her feel good AP oldtruck needs his WW to demonstrate the same kind of "how I wish I could run off to Topeka for the weekend with you" as she did with Mr Shmoozie pants.
If this was not about "effort" towards looking great for BS as she did for her AP and her A, but was rather her doing the serious effort to plan and arrange and figure out how to make happen regular trips with oldtruck.........but wait, she determines, they've been married for 30 years and love each other so much that that kind of often romantic trip is just a waste of money and not necessary............would the view of this "effort" from her be the same.
He wants from her what she did for herself, for her AP, and for the A.......the effort to do the same. If her effort had been arranging travel for the benefit of her A, would we think it unreasonable if he expected the same time, energy, interest in planning travel for him, even if travel was no longer of that much interest to her and she had "reasonable" issues that led her to the limited effort?
Is this mostly because what oldtruck needs from his fWW unfortunately has to do with her personal extra effort to look as good as she looked for her A, and and this "looks" effort thing is the trigger?
I think this is the most simple and basic of all post-infidelity concepts that exists, muddied by unnecessary complexities. The simple question seems to me to be, does a BS have a reasonable basis to ask of their self-proclaimed remorseful, contrite, empathetic WS to extend the same effort towards their BS and the R as they extended to themselves, their AP, and their A? It does not seem a reasonable premise that to extend the same effort in romance or sex or care or attention or travel, or whatever to their BS is inherently tied to some sense that to do these thing would be to ask the WS to continue with their unhealthy ways.
It is healthy for a WS to show remorse and empathy and deference and contrition and effort, that builds trust in the way the BS does. None of this would be encouraging bad habits or unhealthy ways that got the WW to where they ended up. I think there is much more going in responses than reaction to the concept of effort needed by the BS, as a means to determine if trust and vulnerability is safe.
What then is a reasonable effort need and what isn't? If a WS spent once a month eating out at a fancy restaurant with their AP, was then outed, then made justifications to their BS for how going out to fancy restaurants with their BS in R was just not needed, that hey only did it with AP because they needed to to keep up the kibbles......would the too be seen as an unreasonable effort need by the BS. Where is the line drawn?