I think this is governed by necessity.
Few would argue that we want more experienced nurses to be Charge. But where are they? So you go with what you've got. Help her do a good job. Give her support, since ultimately you're all concerned about good patient care.
FWIW, much of the Charge's job is flow management. You don't need a lot of clinical experience to manage well. Preferred, sure; but not an absolute. Some folks have a real talent for organizing (not me!), and can apply to almost anything once they learn the ropes. Some really older nurses will remember when 'charge' was a task, not a seperate position. The task was rotated among nurses one shift to the next, and many new nurses found themselves playing charge shortly after school.
When there are clinical task problems, you can still ask the most experienced colleague; Charge or not. And if there is no one available with more experience, well that just proves my point.
In the military, the best NCOs are the old pros. But there aren't enough of them. So many of us youngsters found ourselves in small command. We were too young and stupid to realize we shouldn't/couldn't do the job; so we just went out there and got it done (most of the time). The analogy is simple...