This..!!!! Trade off.. yes! I'm in my mid 40's and have children, sadly two marriages behind me that didn't last. One has gambling addictions and the other was having an affair even at time of wedding.. to give context!
I have 4 children and most recently a baby to an unavailable man. I look at recent mistakes I've made and the life long responsibility that comes with it. The children are my world but I recognise that they will leave one day, possibly? And I will be on my own. I recognise that I also don't do well on my own and this is from childhood abandonment issues. They have driven wrong decisions, as mentioned but the trade off is beautiful babies who keep me going.
So I guess you create your own happiness and peace, contentment? It might not always be the way you like it but if afforded the luxury of living a comfortable life in later years then that's something that could be contended eith? It really comes down to the life you want...
There will always be a downside, but you get to create the upside.