Headphones have their place in the studio...mostly for tracking, but also for when you need to listen more critically for some issues, etc.
AFA the whole "honing in on details"...I know what you, mean, and good monitors will actually let you do that more "naturally" then phones, but generally speaking, I think people these days spend way too much time (myself included) "honing in on details".
We do that because we feel it's going to make a lot of difference...because where tweaking things at the sub-molecular level, it will somehow bubble up and make the overall all mix that much more obviously better.
TBH...I think it actually may detract...and the notion of mixing more for total emotion and impact, and "pulling back" so you get the "big picture" as you mix, actually may be the better way to go.
I mean, it's nice that we can micro-tweak the shit out of everything *when it's really needed* but it may not be as much as people do it these days....or worry so much about the numbers, etc.
IOW...mix to elicit obvious feelings (good or bad) rather than mixing to create something that is sonically "perfect" ...but boring to listen to.
It's hard...because we're always fighting concerns about audio quality, especially at the home rec level where many of us are working with a lot of limitations, and then in doing so, the quest for sonic perfection can actually make us lose sight of the stuff that releases the emotions. Not saying every songs has to or will cause us to feel something deep...but I think that's really what ends up making the difference in how much a song connects...and again, it doesn't always have to be a song we absolutely love...it can be one we don't much like, but it draws out the deeper emotions in us.
OK...I kinda drifted off there a bit...
...so yeah, if you need to use some headphones go for it, but I think most people with good monitors, in a good space, and without any restrictions to use them (neighbors and such) are not going to spend a lot of time with headphones and then shift to the monitors at the end, because the whole image thing will be different...especially when you get use to it on the phones.