As to what's the big-ass problem with using the 24/7 LL-1 sweet-spot?

Orval Fairbairn; Getting there.

But all significant missions (other than on behalf of our nuking Earth)
are of those supposedly going far beyond our moon, and the moon itself
is actually offering quite a nifty gravity pull on behalf of getting
loads of stuff into the LL-1 pocket, as well as on behalf of
subsequently transfering such missions past the moon at the greatest
possible exit velocity, whereas all that's necessary via terrestrial
deployments as headed to getting parked within LL-1 is whatever little
energy it takes for barely coasting such tonnage into that sweet-spot.
Therefore, given more days in route, 100t per Saturn-V and perhaps
twice again for a fully LRB first and second stage worth of h2o2/c3h4o
with only the third stage of LOX/LH2 should do that trick at far less
than half if not a fourth the horrific inert mass of what the old
Saturn-V represented.

Again, we're talking about using the least amount of rocket energy per
delivered tonnage into an efficient station-keeping orbit, and since
it's mostly intended for robotics to deal with, there's certainly no
hurry in getting there.

It's actually your NASA/Apollo mindset that's insisting such tonnage
via their old and extremely inert massive Saturn-V was supposedly worth
accomplishing 51t getting entirely past LL-1 and even into orbiting our
moon, and that's along with initially hauling their LES at 4.17t for
the first two stages worth of the launch, and having made considerably
better velocity as per passing that tonnage clean through LL-1 at good
enough speed in just 2.5 days, therefore obviously having taken much
greater energy expenditure than a purely robotic delivery of bulk
rocket fuel to the LL-1 depot would otherwise have demanded.

And once again I'll have to ask, what's the big-ass problem with using
the 24/7 LL-1 sweet-spot?

If serious push came down to shove (such as for a manned mission),
perhaps a 24 hour time from the surface of Earth to reaching LL-1 along
with a butt load of retro-thrusters blazing away seems doable.
Obviously without having significant retrothrust as per velocity
breaking involved, the time from Earth to coasting gradually into home
plate at a few meters/second and thus slowly arriving into LL-1 might
be configured as taking anywhere from 5 to 7.5 days worth. Though
what's the hurry?
-
Brad Guth