I would have loved more than one child but life doesn't always go according to plan.
The pros of only having one child are:-
Less work - only one set of clothes to wash, only one child to bathe, only one child's toys to tidy up etc.
Less organisation required - I only need to keep track of one child's afterschool activities, play dates, uniform/tracksuit/afterschool activity clothing etc.
Sickness - I only have to deal with one vomiting child/child with diarrhoea. I can only imagine how horrible it would be to be tending to multiple sick children at once . My bosses are fairly understanding if I have to take the very occasional day off work if DD is sick. They would be less understanding if I was taking twice as many days off (or three times as many etc.).
More peaceful - I don't have to deal with siblings fighting over toys or a TV programme.
Less expensive - childcare, school books, afterschool activities, days out, college fees etc.
Travel - a lot easier packing for one
DD gets my undivided attention. If she's upset I have the time and energy to find out what's wrong and try to resolve it. I come from a big family and my mother was always tired and stressed. When I was getting bullied at school, I never told her because I figured she had enough on her plate.
DD gets to do activities that are suitable for her age and interests. She's not dragged along to places or activities just because an older or younger sibling is going.
These are the main ones I can think of. There are cons too obviously but I'm sure you all have plenty of judgemental people in your lives to point them out. Like the mother who told me that she wouldn't want her son to date DD when they're older as DD (being an only child) will be a spoilt princess and he'd never be able to make her happy
. Or my male colleague who told me that an only child is a lonely child etc.