Nothing will stop people taking their children out of schools for holidays.
It has always happened and it always will.
And tbh, if not in GCSE/A Level years, then a week or two once a year really will not harm a child's education.
I have been a teacher and I still work in schools, and I can assure you that for the vast majority of children a term time holiday really doesn't have that big an effect on their overall education.
I always had term time holidays when growing up. My dad only got shut down holidays and they were never in school holidays. We never went abroad but we did spend valuable time together as a family for a week or two once a year. And yet all three of us siblings went on to university, got good degrees, got decent jobs and live good lives.
Education is very important but education does not only occur in the classroom with 30 other children and a teacher. And sometimes spending time together as a family, away from the day to day rigours of life, can be just as equally important too.