I see it differently, she isn't closing her practice or changing her availability that much, she just can't see clients every week of the month. If she is using the one week a month as holiday/vacation why would she offer a phone session instead - that would mean she is still working. I agree it's one of those things where she gets to decide how she works and it may not suit everyone but she isn't ending, abandoning etc she's just changing her work pattern.