I kick them out every day 
We live in the country side. I wouldn't let the kids stay inside all day unless ill or tired and content to have a slob out duvet day without any whinging.
I can't imagine staying in the house all day ever unless ill.
However that doesn't mean that I take them on outings, they just go outside to play in the playground or on the green or the football field, or call for friends or friends call for them.
I work a 24 shift (including 6 hours sleep, 18 paid hours) either Friday midday to Saturday midday or Saturday midday to Sunday midday so we don't do big outings at weekends, only in the holidays, but we might go swimming or to town for an ice-cream by the river.
My older 2 are out of the house under their own steam (14 year old organised a trip to the open air pool and has gone with her friends, 12 year old is at a birthday sleepover which he walked to by himself) but my 8 year old is currently playing a make believe game around the living room, where I am. If he complained of boredom I'd give him short shrift and suggest even more boring chores he could do, and he'd decide to go to the playground or phone his friend who lives at the other side of the village and invite him over, or ask to cycle over to his, or ask to call a friend who lives a bit further away requiring liftsto play with.
I don't really tolerate whinging about boredom though, I think of even more boring alternative and suddenly inspiration hits and the kids entertain themselves!
Their friends are always welcome here though, and I'll always give lifts if they're invited to play (or go to not play for the teen) somewhere - I think that's essential.
Is your DD used to spending most of her time in structured childcare when not at school?
Children who are used to constant adult led activities really seem to struggle massively without adults entertaining them or telling them what they should be doing, but they need unstructured time desperately, it's just very hard for them until they have had plenty of practice at organising their own free time and developed some inner resources and independence.