You're trying to bend a birding day to fit the binoculars you have bought, and it just won't work.
Again, I'd suggest this view is based on the (very) flawed assumption that everyone goes 'birding' in the same way.
If indeed spending considerable amounts of time walking through varied habitat is your regular (only?) form of birding, then I completely accept that one do-it-all binocular makes for an eminently sensible choice.
But wait... doesn't that mean that your one binocular-of-choice has been selected because it's 'specialism' is one of an all-rounder? In other words, the best tool for the job in the event that your main (only?) birding style consists of walking for considerable tracts of time through mixed terrain?
So what's the difference? Given your own very personal style of birding, you've presumably consciously chosen the binocular you think will be best for the style of birding you're habitually doing. I do exactly the same - only I bird in different ways.
Please follow...
I'm birding right now: whilst also typing this. I'm sitting in my conservatory overlooking a small meadow closed by trees. All my horizons are close by and it's daytime. I find my NL 8x32 exactly the right choice here, not least - between keystrokes - to best enjoy insects whilst there are no birds in view.
Later this morning I'll be going for a training ride on my bike. I'll take, as I always do, my 10x25 pockets so I can continue, if I choose, to 'bird' incidental to my ride. If I were going for a training run instead, I'd take, as I always do, my 8x20 Monovid for exactly the same reason.
This evening, I'll be going up to my local hide for an hour or so, which affords views over vast and distant tracts of open water, floodplain and meadow. The sole focus of this trip will be to watch birds. I'll be taking my NL 12x42 and my CTC 30x75. I'll almost certainly exclusively use the 12x, but may deploy the scope if there's something I need to check on, or want a 'larger' view of.
When I return I'll have have something to eat and then return to casually birding in the conservatory with a beer. Again I'll have the NL 8x32 with me.
This is a very typical day for me so I guess I 'bird' quite a lot. However, I do it in many and varied ways (like I'm quite sure many others will). Sometimes my birding is incidental to other activities: sometimes not.
Now... as a result of this thread I'm feeling like I'm perhaps not a 'proper' birder after all, but instead, more one of those (cue sotto voce) 'optics fans'. I feel somewhat disparaged and this leaves me feel uneasy: I
thought I was a birder just using the best tool for the job at any given time but, on reflection, perhaps not.
I've seen the light. I
want to be a birder and not a stupid optics fan bending my day this way and that - so I'm now tempted to sell everything and start again.
So, given my daily activities and
genuinely chaotic style of birding, would
any of the advocates of one do-it-all birding optic like to advise me which one do-it-all birding optic I should buy?
PS, my bike jersey pockets are only big enough for a something absolutely no larger than a Victory Pocket x 25.