As a parent I would be fine with that, better a week or 2 on a family holiday than long term sick leave or breakdowns that have happened in my DCs school.
Last year we ran with no HT, no DHead, no bursar/office staff, no reception teacher and yr5/6 teacher went on maternity 4 weeks before SATs. I think the year 1 teacher went on long term sick as well. We also had an amazing TA and SEN staff member on extended leave due to a family tragedy.
The school amazingly managed, but only due to staff and governors stepping in.
I would have no problem if schools were able to manage to give staff essential leave on a time table base during term times if it gave them essential down and family time. The amount of days with no staff due to sick leave and staff quitting, it would make no difference to the children in the school.
I’ve actually lost track of teachers in each class over the last 2 years, I asked my DDs what teachers are in their classes and it was well sometimes it’s Miss X, & Mrs Y on Fridays and then Ms Z takes me just for maths but Mr P for this…
One has possible SEN yet the way the school are managing things has not had any detrimental impact on any of them.
My DCs are in a small school where staff have always moved around and been flexible so I see it can work, I will admit after 6 reception teachers coming and going last year I started to worry, but it’s had no lasting effect. I can also understand it wouldn’t always be as easy in big schools. And any school to run smoothly would need the right kind of management to make it work.