Most working parents find it a nightmare which surely indicates a problem that needs looking at.
I'm still at home - which isn't great for me - because we couldn't swing the childcare costs a lot of that was no family help in holidays and steep prices in childcare available. So I hear what you are saying.
However it's only an considered an issue for parents with children really in Primary school ( not sure I agree 6 weeks no adults is long for 11 year old) - so it's not all parents and not all working parents.
Many working parents I know have family help - so it's not a huge issue for them many of them find pre/after school care more of an issue.
Not all working parents have full care - break ups etc - so shared holiday time - and some working parents have SAH spouses. So it's not a issue for them.
Some parents have term time working others I've know have managed none paid leave.
Most working parents every year cobble something together.
So I don't see any major political driving force that will produce change. Change itself will upset someone and cost money.
I do see lip service paid to working parents at election times - and poorly thought though headline grabbing ideas that often cause problems or get quietly dropped.
I do think it needs looking at because more parents work or want to work and because it is affecting children - there's research that shows long summer break adversely affects poorest children most - I just don't think anything will happen.