Let's also take into account how many ingredients you may need from the fridge when you plan ahead. Certain meals may require multiple trips to/from the basement (however far away that may be) depending on how many - and the size of - ingredients involved.
Also, what mjmj said, re:kids.
Not having the fridge readily available in the kitchen would suck, though, so that only works if you have a dedicated freezer.
While this may be OK for single or couple without children, it's hard to imagine it for family with 4+ members.
Planning really isn't that difficult. People do it all the time when they go to the grocery store.
That way she can load the cooking ingredients into the smaller kitchen freezer before cooking, can keep most of the stock in the basement.
Best of both world, assuming you're sufficiently organized to actually remember to move the stuff to the kitchen in advance, and not forget half of it :-)