I don't know why I feel the need to defend myself but here goes. When I married my first husband the wedding ended up being child free. We set a budget, financially as we didn't want to clear all our savings (just the wedding ones) and we certainly didn't want to run up debt (surely that is sensible). IT was more we ran out of guest places before reaching the children rather than saying oh no no children.
This resulted in us having a venue that had a maximum capacity of 80 people and that was what we could afford to pay for. We decided the fairest way to set the guest list was to invite our closest relatives. Everyone saying you have to have children seems to agree wedding are all about children.
Her goes with the guest list (dons hard hat for flaming)
The 80 people included us, bride and groom (essential to have a wedding)
Parents (4 people) Its surely natural to have parents of the bride and groom.
Siblings (2 people).
Now at this point if either of us had nieces and/or nephews they would have been invited as our next closest relative but at the time we didn't.
Grandparents (only 2 left).
I make that 10 people.
Next closest were aunts and uncles our parents between them had 13 siblings all of whom were married or in long term relationships (26 people).
Next cousins, all 19 or older as they had grown up by the time we married. Between them they had 27 children, all of whom had partners (52 children).
So that was 10+26+52=88 which caused panic as was over our numbers. We spoke to venue who explained that licence was actually for 90 but they said 80 to be safe so we went ahead and invited all the above as only slightly over. We were actually under as 10 people couldn't come in the end.
Now if we were to invite children we would have had to invite the next generation which consisted of at the time 23 children, 3 of whom were older and had partner so 26 people.
To go 34 over numbers meant another venue which was £8 per head more expensive so would cost over £1000 more plus the extra bus needed to fit everyone in, and all the other extras in.